[codex] cut over Recoleta refactor audit to released Cremona

[NeapolitanIcecream]

Summary

• replace the repo-local refactor audit implementation with direct cremona integration
• move Recoleta's routing and scope rules into tool.cremona.profiles.recoleta
• regenerate quality/refactor-baseline.json under schema_version = 3
• switch the cremona dependency from Git main tracking to the released 0.1.0 package

What Changed

• remove scripts/refactor_audit.py and its dedicated test module
• add coverage-backed CI gating with coverage json -o coverage.json and cremona scan --coverage-json coverage.json --fail-on-regression
• keep Recoleta-specific subsystem routing and compatibility pressure heuristics in the custom profile
• update README, CONTRIBUTING, AGENTS guidance, and the repo-local refactoring skill to the new command surface

Why

• cremona now ships as a published package, so Recoleta no longer needs to consume unpublished Git snapshots
• the old repo-local implementation and schema version 2 baseline are obsolete after the cutover
• pinning a released package gives cleaner upgrade boundaries for future audit, routing, and baseline changes

Validation

• uv sync --frozen --group dev
• uv run ruff check .
• uv run coverage run -m pytest
• uv run coverage json -o coverage.json
• uv run cremona scan --coverage-json coverage.json --fail-on-regression