v0.4.0-alpha.8

What's Changed

• feat(link): add staged Rust runtime generation manager by @whshang in #50
• feat(link): add staged Rust runtime-control loop by @whshang in #51
• feat(git): compact herdr_git status and land architecture roadmap by @whshang in #53
• feat(exec): compact large successful exec output by @whshang in #54
• feat(fs): compact herdr_fs_grep matches by file by @whshang in #56
• feat(git): compact herdr_git diff and log output by @whshang in #55
• feat(search): prefer rg for herdr_fs_grep with rust fallback by @whshang in #52
• feat(projects): reuse routing topology within mutation gates by @whshang in #58
• docs: refresh roadmap status after RO, Search, and PCC slices by @whshang in #59
• fix(edge): keep ephemeral reads alive under DO write quota by @whshang in #60
• feat(exec): Streaming First progress on start/read by @whshang in #62
• docs: mark Streaming First and Edge harden on roadmap by @whshang in #64
• fix(service): surface health-watchdog in status by @whshang in #63
• Tighten skill wave guidance for compact results and long exec by @whshang in #61
• feat(link): add staged candidate-only Rust daemon assembly by @whshang in #65
• feat(exec): sync path completion progress parity by @whshang in #66
• docs: refresh roadmap status after Streaming #66 by @whshang in #67
• chore(release): prepare Rust alpha.8 by @whshang in #68

Full Changelog: v0.4.0-alpha.7...v0.4.0-alpha.8