(cherry picked from commit 002cc07)

(cherry picked from commit 005b25e)

* perf(inbound): trim cold startup import graph

* chore(reply): drop redundant inline action type import

* fix(inbound): restore warning and maintenance seams

* fix(reply): restore type seam and secure forked transcripts

(cherry picked from commit 041f0b8)

(cherry picked from commit 0a0ca80)

(cherry picked from commit 0bfaa36)

(cherry picked from commit 2b5fa09)

(cherry picked from commit 3382ef2)

(cherry picked from commit 4aae0d4)

(cherry picked from commit 05634ee)

(cherry picked from commit 1c6676c)

…w#45660)

* refactor: move Discord channel implementation to extensions/discord/src/

Move all Discord source files from src/discord/ to extensions/discord/src/,
following the extension migration pattern. Source files in src/discord/ are
replaced with re-export shims. Channel-plugin files from
src/channels/plugins/*/discord* are similarly moved and shimmed.

- Copy all .ts source files preserving subdirectory structure (monitor/, voice/)
- Move channel-plugin files (actions, normalize, onboarding, outbound, status-issues)
- Fix all relative imports to use correct paths from new location
- Create re-export shims at original locations for backward compatibility
- Delete test files from shim locations (tests live in extension now)
- Update tsconfig.plugin-sdk.dts.json rootDir from "src" to "." to accommodate
  extension files outside src/
- Update write-plugin-sdk-entry-dts.ts to match new declaration output paths

* fix: add importOriginal to thread-bindings session-meta mock for extensions test

* style: fix formatting in thread-bindings lifecycle test

(cherry picked from commit 5682ec3)

(cherry picked from commit 58cf9b8)

(cherry picked from commit 59bcac4)

(cherry picked from commit 6fa0027)

…w#45517)

* refactor: make OutboundSendDeps dynamic with channel-ID keys

Replace hardcoded per-channel send fields (sendTelegram, sendDiscord,
etc.) with a dynamic index-signature type keyed by channel ID. This
unblocks moving channel implementations to extensions without breaking
the outbound dispatch contract.

- OutboundSendDeps and CliDeps are now { [channelId: string]: unknown }
- Each outbound adapter resolves its send fn via bracket access with cast
- Lazy-loading preserved via createLazySender with module cache
- Delete 6 deps-send-*.runtime.ts one-liner re-export files
- Harden guardrail scan against deleted-but-tracked files

* fix: preserve outbound send-deps compatibility

* style: fix formatting issues (import order, extra bracket, trailing whitespace)

* fix: resolve type errors from dynamic OutboundSendDeps in tests and extension

* fix: remove unused OutboundSendDeps import from deliver.test-helpers

(cherry picked from commit 7764f71)

(cherry picked from commit 7964563)

(cherry picked from commit 7ae0941)

(cherry picked from commit 8b001d6)

(cherry picked from commit 8e6a4c2)

(cherry picked from commit 9270094)

(cherry picked from commit 92bea97)

(cherry picked from commit a0e7e3c)

(cherry picked from commit a2518a1)

(cherry picked from commit b4656f1)

(cherry picked from commit c156f7c)

(cherry picked from commit d163278)

(cherry picked from commit d663df7)

(cherry picked from commit e56e492)

(cherry picked from commit f1b2c56)

(cherry picked from commit 8b001d6)

(cherry picked from commit b4656f1)

(cherry picked from commit c156f7c)

(cherry picked from commit 208fb1a)

(cherry picked from commit 2659fc6)

(cherry picked from commit 301594b)

(cherry picked from commit 3eb039c)

(cherry picked from commit 58a51e2)

(cherry picked from commit 59be2c8)

(cherry picked from commit 59d355b)

…gent layer

…rk structure differs from upstream

…odule structure

…ersions

…xtractions

…efactoring