chore(main): release 2.1.0

[github-actions]

🤖 I have created a release beep boop

2.1.0 (2026-07-16)

Features

• 1407 list creatives concept ids (#1493) (b46d824)
• populate concept_id/concept_name from GAM order (#1506) (#1509) (c30e86e)
• UC-002/003 validation wiring + canonical error-code reconciliation on adcp 5.7 (#1417) (9ac08da)

Bug Fixes

• advertise only backed creative-agent capabilities (drop unbacked 'delivery') (#1543) (c0b447b)
• bump pillow>=12.3.0 and pin click>=8.3.3 for CVE fixes (#1599) (0c8c923)
• expect SERVICE_UNAVAILABLE for UC-019 targeting rehydration BDD (#1649) (40aacea), closes #1571
• get_products: coerce string brand URL shorthand to BrandReference (#1324) (#1537) (fd4a5d1)
• map ADCP exceptions to specific types in signals_agent_registry (#1483) (d441d4c)
• spec delivery wire — completed_views rename and media-buy status taxonomy (#1545) (5618240)
• wrap MCP TypeAdapter validation errors (#1534) (61d6399)

Performance Improvements

• parallelize the test suite — scenario-level BDD distribution, tmpfs test DB, opt-in xdist (#1572) (2b487cc)

Code Refactoring

• test: drop on-disk probe in allowlist-diff self-tests (#1541) (941061d), closes #1467

Documentation

• adr: honest #1228 F1/F2/G2 quality-amnesty policy (ADR-009) (#1579) (06f8987)
• correct G2 obligation-allowlist docstring (#1609) (#1612) (2aaca62)
• correct README and CLAUDE.md accuracy and state alpha status (#1542) (6cb8567)
• Note Code Quality path exclusion unavailable (#1422) (#1562) (39f5a79)

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