ActiveGraph v1.12.0

Merge pull request #62 from yoheinakajima/claude/release-v1.9.0

Release prep: v1.9.0

Merge pull request #57 from yoheinakajima/claude/activegraph-runtime-…

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Release v1.7.1 — portable macOS trial-child resource limits

Merge pull request #56 from yoheinakajima/claude/activegraph-runtime-…

…verify-635hwk

Release v1.7.0 — the sandbox-hardening release

Merge pull request #55 from yoheinakajima/claude/activegraph-v1-6-cyc…

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Release v1.6.0 — the closing-the-loop release

Merge pull request #54 from yoheinakajima/claude/activegraph-v1-5-cyc…

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Release v1.5.0 — the designs-become-code release

Merge pull request #53 from yoheinakajima/claude/activegraph-v1-4-cut…

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Release v1.4.0 — the manifest-and-rollback release

Merge pull request #52: Release v1.3.0 — the agent-readiness release

Release v1.3.0 — the agent-readiness release

Merge pull request #49 from yoheinakajima/claude/repo-priority-analys…

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Release v1.2.0: lock the GraphStore contract, add the test-suite CI gate, scope v1.3