M6.5: Release v0.1.0

[bjcorder]

Labels: type:infrastructure, area:build, priority:critical,
status:blocked, milestone:M6, phase:10

Summary

Tag and release v0.1.0 with signed binaries and SLSA L3 provenance.

Acceptance criteria

• All M1–M5 issues are closed
• All M6 issues except this one are closed
• Demo passes from a clean checkout
• CHANGELOG.md created with v0.1.0 entry summarizing the release
• Tag v0.1.0 is pushed
• Release workflow runs successfully
• GitHub Release is published with binaries and provenance attached
• Release is announced (announcement issue is fine for now; blog
  post deferred)

Dependencies

Depends on: all other M6 issues

This completes Milestone M6 — ForkGuard v0.1.0 is released.

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Milestone M7: Registry Consumer & Rulegen Integration

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