docs: record stable release evidence

[tensornull]

Summary

• mark stable 0.1.0 complete in the roadmap and public README
• record the immutable release, recovery run, PR and main CI evidence, public digests, provenance, and clean install
• preserve both failed recovery attempts as negative evidence and narrow future recovery-variable lifetime to identity verification

Evidence

• release workflow run 30359383715 completed successfully on attempt 1 from main@9cd6041
• immutable v0.1.0 resolves to 6f42981edcc6c252f8db997606671c3da84d1dd8
• public wheel SHA256: 8eae758688bb6c98274e48d8d81f882eeae760f69cfd2f5e125004881d60e90f
• public source SHA256: e9308b44f6091200b5121e24d1a0e1b9ea3e6bcccc109d6de87554b1ab2a8bca
• retained pre-publication digests and Trusted Publisher provenance independently matched both public files
• isolated cometapi==0.1.0 installation, public imports, and all README mocked-call examples passed

Verification

• uv lock --check
• Ruff check and format check
• Pyright
• 253 non-live tests
• version, releasable-doc, public-doc, secret, workflow-semantic, and offline actionlint checks
• clean wheel and source build, metadata/artifact checks, and independent clean installs
• copied standalone-repository verification