chore(main): release 0.39.0

[release-please]

🤖 I have created a release beep boop

0.39.0 (2026-08-25)

Features

• dart: exclude all generate files (#7367) (7d03e50)
• go: add control for the protobuf code generation level (#7351) (1476dd0)
• internal/librarian/php: allow skipping GAPIC client generation (#7332) (8702675)
• internal/librarian/php: allow skipping sample generation (#7348) (8ac4c94)
• internal/librarian/php: explicitly set copyright years during post-processing (#7328) (5df5834)
• internal/librarian/php: initialize default library version on add (#7381) (1baf7d9), refs #7382
• internal/librarian/php: support excluding protos from generation (#7335) (f3a328b)
• internal/librarian/ruby: forward ruby cloud title option and add beyondcorp titles (#7364) (14f8e33)
• internal/sidekick/rust: refactor bidi streaming templates (#7312) (1119b7a), refs #6835
• internal/sidekick/rust: support server-side streaming in gapics (#7372) (7e1065d), refs #7373
• internal/sidekick/rust: support used_if streaming package deps (#7345) (084470b), refs #6835
• sidekick/rust: bigquery generated types will move to model_ext (#7365) (4eaeba5)
• sidekick/swift: clients are Sendable (#7390) (605505f)
• sidekick/swift: generate doc landing page (#7353) (50fae5d)
• sidekick/swift: generate smaller LROs (#7334) (f945e9d)
• sidekick/swift: use _QueryParameterEncoder (#7356) (bed3922)
• sidekick/swift: use @_spi for some imports (#7318) (9d4a5b3)
• sidekick/swift: use @_spi in retry stub (#7357) (c5c8aed)
• swift: support gRPC routing parameter extraction (#7346) (2aa5ef5)
• swift: support service name overrides for doc link resolution (#7319) (7637cf6)

Bug Fixes

• dart: use [@doc](https://github.com/doc)Import for service exceptions (#7322) (f72812a)
• internal/librarian/ruby: forward all ruby cloud opts to generator (#7360) (ba46b05)
• internal/sidekick/rust: use anyhow::Result in bidi streaming samples (#7347) (2c61bae)
• librarian/swift: support showcase generation (#7338) (50aa62e)
• sidekick/rust: redundant body fields (#7378) (65ff2ca)
• tool/cmd/migrate/php: parse and extract gapic_yaml from BUILD.bazel (#7355) (1a47f13)

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[release-please]

🤖 Created releases:

• v0.39.0

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