chore(governance): add governance gates

[chitcommit]

Adds SHA-pinned Governance workflow calling CHITTYFOUNDATION/chittycanon and enables Portfolio Hardening.\n\n- Required for CF Workers Builds portfolios.\n- Enforces CODEOWNERS + hardening gates.\n- Governance SHA: 83a7d1da1cfa5041f18450a6d43ff336068285de

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⚙️ Run configuration

Configuration used: defaults

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Run ID: dcdcfca9-4822-4645-87f7-9faea9f3e601

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Reviewing files that changed from the base of the PR and between cb98293 and c634f6f.

📒 Files selected for processing (1)

• .github/workflows/governance.yml

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🧪 Generate unit tests (beta)

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• Commit unit tests in branch chore/governance-bootstrap-83a7d1d-20260417

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Pin governance_version input to an immutable ref

This workflow pins pr-governance.yml to a commit SHA, but with.governance_version: main reintroduces a mutable reference: if the called workflow uses that input to resolve policy content, behavior can change whenever main moves without any update in this repo. That weakens the immutability guarantee documented in this file and can let governance outcomes drift unexpectedly; pass an immutable value (for example the same pinned SHA) instead of main.

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[chitcommit]

Closing — governance branch protection was removed across all 154 chittyOrg repos (2026-04-23). The governance.yml workflow this PR would add is no longer required, and the gate it was meant to satisfy no longer exists. If governance is re-enabled later with a sustainable approval path (e.g., dual-identity review), the workflow can be re-added deliberately alongside the branch protection change.