## Summary

Rename the experimental row binlog to **changelog** in the English and
Chinese docs, following apache/doris#69311. Three pages move to new URLs
(old URLs redirect in every locale), every page that mentions the
feature uses the new property names, table function, hidden columns,
error messages and switch, and the changelog page now describes the
behavior #69311 introduced.

## Why

apache/doris#69311 renamed row binlog (`"binlog.enable" = "true"` +
`"binlog.format" = "ROW"`, the change stream that Table Stream and
incremental materialized views read) to changelog and split it from CCR
binlog. It is a hard cut on an unreleased feature, so the docs on master
describe names that no longer exist:

| Before | After |
|---|---|
| `"binlog.enable" = "true"` + `"binlog.format" = "ROW"` |
`"changelog.enable" = "true"` |
| `binlog.ttl_seconds` (ROW tables), `binlog.need_historical_value` |
`changelog.ttl_seconds`, `changelog.need_historical_value` |
| `binlog(...)` table function | `changelog(...)` |
| `__DORIS_BINLOG_{TSO,LSN,OP}__`, `__BEFORE__<col>__` |
`__DORIS_CHANGELOG_{TSO,LSN,OP}__`, `__DORIS_CHANGELOG_BEFORE_<col>__` |
| `enable_feature_binlog` (FE, BE) for row binlog and TSO |
`enable_feature_changelog`; `enable_feature_binlog` is CCR only |

CCR binlog, `SHOW PROC '/binlog'`, MySQL binlog CDC, Canal binlog load
and Paimon `$binlog` do not change.

## Renamed pages and redirects

| Old URL | New URL |
|---|---|
| `/docs/dev/data-operate/incremental/row-binlog` |
`/docs/dev/data-operate/incremental/changelog` |
| `/docs/dev/sql-manual/sql-functions/table-valued-functions/binlog` |
`/docs/dev/sql-manual/sql-functions/table-valued-functions/changelog` |
| `/docs/dev/key-features/binlog-table-stream` |
`/docs/dev/key-features/changelog-table-stream` |
| `/docs/4.x/key-features/binlog-table-stream` |
`/docs/4.x/key-features/changelog-table-stream` |

The same four mappings apply under `/zh-CN`, `/ja`, `/ko` and `/ru`. The
redirects are one loop over `ENABLED_LOCALES` in `buildRedirectIndex()`
(`docusaurus.config.js`), next to the DOG Stack block and in the style
of the hackathon redirects, so each optional locale gets them as soon as
it is enabled. They are not in `config/redirects-dev.json`, which lists
en and zh-CN paths only, nor in `config/redirects-4.x.json`, which
`scripts/migrate-4.x/build-redirects.py` generates. Evaluating
`createRedirects` from the site config gives 20 old paths with
`DORIS_ENABLE_LOCALES=ja,ko,ru` and 8 with the default locales.

The PR has two commits so the moves stay reviewable: the first only
moves the six files (en / zh-CN, dev / 4.x), and the second rewrites
them. The rewritten pages keep 36–41% of their text, so the combined
diff shows them as delete + add; look at the second commit to see what
changed in them.

The key-features slug is now `/key-features/changelog-table-stream`. The
card image keeps its name (`binlog-table-stream.jpg`): pages reference
it by path, nothing pairs it with the page by file name. `sidebars.ts`
points to the new doc ids; the table function moves to its alphabetical
place.

## Other changes

- The changelog page documents the new behavior: `changelog.enable` and
`changelog.need_historical_value` can only be set by `CREATE TABLE`,
`changelog.ttl_seconds` can be altered, `binlog.format` and
`binlog.need_historical_value` are rejected, CCR binlog and changelog
are mutually exclusive (table, database, `RECOVER TABLE`), temporary
tables never have changelog, a database can make changelog the default
and `SHOW CREATE TABLE` then prints `"changelog.enable" = "false"` for
tables without it, views / CTAS / MTMV over `changelog()` must list and
alias the `__DORIS_` columns, and `enable_feature_changelog` is needed
in `fe.conf` (and `be.conf` for cleanup). A short note says the feature
was called row binlog in earlier development builds and that tables
created that way must be recreated.
- Every quoted error message matches the FE on Doris master, for example
`Changelog offset has expired according to changelog.ttl_seconds`, `INCR
query requires changelog enabled on base table.`, `Base Olap table ...
need to enable changelog for table stream`, `Not allowed to perform
current operation on Table With changelog`.
- Stale content fixed:
  - `binlog.format` case sensitivity (the property no longer exists);
- the key-features pages enabled ROW with `ALTER TABLE ... SET
("binlog.format" = "ROW")`; changelog can only be enabled by `CREATE
TABLE`;
  - the OP hidden column is `BIGINT`, not `TINYINT`;
- the changelog page said backup / restore work as usual; the FE rejects
backup and restore of tables with changelog;
- the key-features pages described CCR binlog and ROW as two formats of
one binlog; changelog is a separate, per-table change stream that cannot
be combined with CCR binlog. The same pages also used `CREATE STREAM ...
ON <table>` and `"type" = "default"` (now `ON TABLE` and `min_delta`),
listed a `default` consume type (now `detail` / `append_only` /
`min_delta`), and said retention waits for streams and is reported in
`STALE_REASON` (it does neither).
- Table Stream, incremental query, IVM, CREATE TABLE / CREATE STREAM /
DROP STREAM, CREATE ASYNC MATERIALIZED VIEW, MV FAQ, TSO and FE
configuration pages use the new names. CREATE TABLE lists
`changelog.ttl_seconds`.
- Flink Doris Connector incremental reading uses the Doris-side names
and the connector's renamed options
`source.changelog.{increment-type,poll-interval,visible-wait-timeout,offset-table,consumer-id}`
(apache/doris-flink-connector#710); it says "Doris changelog" where
Flink changelog records are also discussed. The required connector
version is now 26.4.0, the release expected to carry
apache/doris-flink-connector#710: 26.3.0 and earlier read the hidden
columns under their old names, so they only work with Doris development
builds from before the rename.
- The Data Warehousing use-case page links to the new key-features URL,
and the query cache decision-flow SVG says "changelog scan".

## Not changed on purpose

- Japanese, Korean and Russian docs and `translations/`: the translation
pipeline re-translates the edited pages and handles the moved ones.
Until then their old translated files are orphaned and the moved pages
show English. The ja / ko labels for `marketing.warehouse.075` still
read "Binlog / Table Stream".
- `src/pages/community-report/` (historical weekly reports),
`scripts/last-update/`, `scripts/migrate-4.x/`.
- CCR docs, `SHOW PROC '/binlog'`, MySQL binlog, Canal and Paimon
content.
- Raster images that still show the old name:
`static/images/next/data-operate/incremental/two-layers.png` and
`static/images/next/query-acceleration/ivm-workflow.jpg` ("Row Binlog"),
and the key-features card
`static/images/next/key-features/binlog-table-stream.jpg`
(`binlog.format = ROW`, and a CCR consumer arrow). Alt texts are
updated; the pictures need to be redrawn.

## Validation

- Static checks on every changed doc: front matter, relative links, MDX
tags, no CJK in English trees, table column counts: pass.
- `scripts/check_md_links_single.py --no-external` on all added /
modified en, zh-CN and 4.x docs: pass. Anchors in the touched files were
checked separately; the only unresolved ones are five pre-existing
anchors in zh-CN `CREATE-TABLE.md` and the MV FAQ, on lines this PR does
not change.
- No en / zh-CN doc, sidebar, component or config links to the old
paths; the remaining mentions of the old names are the rename note, the
rejected-property error messages, CCR / MySQL binlog, the redirect
sources and the card image path.
- `node scripts/check_move.js HEAD`, `python3 check_move.py HEAD` and
`python3 check_move.py <merge-base>`: pass.
- `node scripts/i18n/check-configuration.cjs --all`: pass.
- `I18N_LOCALE=<ja|ko|ru> node scripts/i18n/pr-preflight.cjs --base
<merge-base>` for each of the three locales: pass, 0 errors (source
freshness for these locales is reported, not blocking).
- `node --test` for the i18n `marketing-pages`, `doc-navigation`,
`configuration`, `t04`, `inventory`, `planner`, `multi-locale`,
`locale-registry` and `heading-ids` tests: pass.
- `scripts/key-features/generate.js` produces the card with href
`/docs/dev/key-features/changelog-table-stream`.
- The edited SVG parses and renders with the new text inside its boxes.
- No site build was run.

---------

Co-authored-by: morningman <[email protected]>
Co-authored-by: Claude Opus 5.5 (1M context) <[email protected]>