chore: pin GitHub Actions to full-length commit SHAs

[joshuarli]

Summary

• Pin all GitHub Actions references in .github/ workflow files to full-length commit SHAs

Generated by devenv pin_gha.

🤖 Generated with Claude Code

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

---

New Features ✨

Streams

• Add consumer group override for StreamSource by fpacifici in #273
• Add topic name override for StreamSource and StreamSink by fpacifici in #257

Internal Changes 🔧

Deps

• Bump slab from 0.4.10 to 0.4.12 in /sentry_streams/tests/rust_test_functions by dependabot in #275
• Bump tracing-subscriber from 0.3.19 to 0.3.20 in /sentry_streams/tests/rust_test_functions by dependabot in #261
• Bump bytes from 1.10.1 to 1.11.1 in /sentry_streams/sentry_streams/examples/rust_simple_map_filter/rust_transforms by dependabot in #259
• Bump tracing-subscriber from 0.3.19 to 0.3.20 in /sentry_streams/sentry_streams/examples/rust_simple_map_filter/rust_transforms by dependabot in #274
• Bump time from 0.3.41 to 0.3.47 in /sentry_streams by dependabot in #267
• Bump bytes from 1.10.1 to 1.11.1 in /sentry_streams/tests/rust_test_functions by dependabot in #268

Other

• Pin GitHub Actions to full-length commit SHAs by joshuarli in #279

---

_{🤖 This preview updates automatically when you update the PR.}