PR created by the Librarian CLI to initialize a release. Merging this PR
will auto trigger a release.

Librarian Version: not available
Language Image:
us-central1-docker.pkg.dev/cloud-sdk-librarian-prod/images-prod/librarian-release-container:latest
<details><summary>librarian: 1.0.0</summary>

##
[1.0.0](v0.5.0...v1.0.0)
(2025-11-06)

### Features

* Remove `..._gax` dependency (#2713)
([01675b7](01675b72))

* add context to Librarian PRs (#2698)
([0523329](0523329a))

* add a package comment linter (#2712)
([1bd3e32](1bd3e32e))

* generate pom.xml files (#2682)
([50b95f2](50b95f20))

* add test-container test logic (#2656)
([514cf7e](514cf7e5))

* improve rust-publish logging (#2671)
([585ed50](585ed50b))

* write a timing log at the end of update-image (#2771)
([5fc9e3b](5fc9e3b6))

* migrate Java container from sdk-platform-java (#2670)
([69ac47f](69ac47fd))

* switch to original head after running update-image (#2696)
([7a3e404](7a3e404a))

* format bulk commit from other sources in release notes (#2665)
([7c52da2](7c52da2b))

* enable multi-version API generation (#2699)
([86c5250](86c52507))

* release stage to update pom.xml files (#2772)
([be56755](be567550))

* use proto presence info to generate null-safe code (#2726)
([e36fb81](e36fb81a))

* Base messages in google_cloud_protobuf (#2660)
([e607ea6](e607ea63))

### Bug Fixes

* retry Github 503 requests up to 3 times (#2650)
([09468fa](09468faf))

* Changed docs to ConfigurationException (#2697)
([0950c1e](0950c1e3))

* fix the reference to the old &#34;librariangen&#34; folder (#2677)
([09dc53f](09dc53fe))

* run godoclint via golangci-lint (#2751)
([264a6a0](264a6a0e))

* pass context as the first argument (#2769)
([298a3bd](298a3bd8))

* Move HTTP client creation to `_gax` (#2672)
([4968d63](4968d63d))

* deduplicate bulk commits (#2758)
([4dfae9a](4dfae9ae))

* Support additional api paths for an existing library (#2666)
([50046f5](50046f55))

* remove stray TODO (#2748)
([5072f0e](5072f0e0))

* omit status field when empty (#2654)
([572ae4f](572ae4f3))

* use T.Context in tests (#2768)
([7e7cd2d](7e7cd2dd))

* wrap error to provide more context for commitAndPush (#2767)
([a2a41a4](a2a41a4a))

* use t.Fatal in tests for proper failure handling (#2759)
([cdabb28](cdabb287))

* enforce removal before copying library files (#2765)
([d5ac6c8](d5ac6c87))

* change log level to debug (#2798)
([f042d0b](f042d0bd))

* change path to `doc.go` in docgen test (#2700)
([fd6bae4](fd6bae40))

### Documentation

* use consistent library id in flags and examples (#2770)
([87a1005](87a10056))

</details>

We need to generate (and invoke) a `build.rs` script to generate the
Prost types. We used to leave these scripts in the repo, that was a bad
idea because they exclude the generated code from the packages. They are
also confusing, and kind of ugly.