feat(protocol): adopt AdCP 3.2 rc.0

[bokelley]

Summary

• adopt the signed 3.2.0-rc.0 schema bundle (SHA-256 7c1a6fd428656d9f5559f5ce848423f4f6e8cfd1e9f9b8657fdd6b5e1a4038fe)
• regenerate Python models for product identity, daypart timezone, overlay, flat-rate, and compliance additions
• support RC protocol strings in media-buy action feature gates
• add the RC reporting lifecycle controller contract and reach_unit delivery simulation field

Validation

• make validate-generated
• full pytest: 7,606 passed, 42 skipped, 1 xfailed
• targeted pre-commit hooks: black, ruff, mypy, adopter type checks, bandit, and file checks
• clean wheel/sdist audit: RC schemas included; beta.11 schemas absent

The Python package remains on its managed prerelease line; the release workflow will produce the next SDK beta after this merges.

[aao-secretariat]

Ladon verdict: Approve

Approve — clean additive AdCP 3.2 beta.11 → rc.0 adoption.

Checked against the decision table top-down:

• Rows 1 (critical/high): no findings — none present.
• Row 2 (gated_paths): gated_paths: false, so does not fire despite review_decision: REVIEW_REQUIRED.
• Row 3 (deletion in high-risk paths): all high_risk_reasons entries are (added) — new schemas/cache/3.2.0-rc.0/** files. No (deleted).
• Rows 4/5 (medium findings): none present.
• Row 6 (sticky escalate): no prior decision.
• Row 7 (no-auto-approve team): no team match.
• Row 8 (≥3 medium): zero medium findings.
• Row 9: approve.

The high_risk flag is true only because the PR scaffolds new schema-cache files (all (added)), which per the change-kind guidance is normal additive work, not escalation-worthy. Reviewer confirms: rc version feature-gates in media_buy_actions.py correctly extend to -rc.\d+, the new reporting_core_lifecycle_probe controller scenario validates/dispatches with test coverage, and the generated/schema/packaging changes are clean regeneration paired with the ADCP_VERSION bump. No public export removed, no required/optional flips — feat: is the correct semver signal.

[bokelley]

@rachitm022 @andybevan-scope3 RC.0 adoption is fully green and auto-merge is armed. A human approval from someone other than the last pusher is the remaining gate when one of you has a moment.