Release v0.55.0-preview.1

What's Changed

• chore(release): bump version to 0.55.0-nightly.20260728.gd29268d36 by @gemini-cli-robot in #28569
• Changelog for v0.54.0-preview.0 by @gemini-cli-robot in #28567
• Changelog for v0.53.0 by @gemini-cli-robot in #28568
• chore/release: bump version to 0.55.0-nightly.20260729.g3499c84f7 by @gemini-cli-robot in #28573
• fix(core): classify capacity exhaustion as terminal to prevent retry hangs by @luisfelipe-alt in #28599
• fix(core,cli): propagate InvalidStreamError details to UI for specific empty response guidance by @DavidAPierce in #28566
• fix(cli): fall back to embedded macOS seatbelt profiles if missing by @amelidev in #28551
• feat(pr-generator-core): add environment config parser, command executor, GitHub R… by @joneba-google in #28435
• feat(pr-generator-orchestrator): implement iterative bug-fixing state machine and container worker entrypoint by @joneba-google in #28433
• feat(pr-generator-infra): configure Cloud Run job, Workflows definition, and Dockerfile by @joneba-google in #28431
• fix(release): handle npm dist-tag deletion failures on registries that forbid it by @DavidAPierce in #28694
• fix(core): stop a new user message fusing into an unanswered tool response by @adamfweidman in #28700
• fix(core,cli): repair /compress session reload and quota-fallback tool response loss by @adamfweidman in #28672
• fix(core): preserve functionCall thoughtSignature when stripping thought parts by @sarbojitrana in #28607
• fix(core): unwrap and parse nested gaxios streaming errors from cause message by @luisfelipe-alt in #28689

New Contributors

• @sarbojitrana made their first contribution in #28607

Full Changelog: v0.54.0-preview.1...v0.55.0-preview.1