chore(main): release 1.7.0

[github-actions]

🤖 I have created a release beep boop

1.7.0 (2026-04-01)

Features

• Account management, adcp 3.10 migration, and BDD test infrastructure (#1170) (ccf91eb)
• introduce BDD behavioral test suite (delivery metrics, creative formats) (#1146) (7f0d45a)

Bug Fixes

• add missing AdCP spec fields to UpdateMediaBuyRequest and correct e2e assertions (#1152) (e9a7a67)
• apply SSRF protection to signals agent URL ingestion (F-04) (c18ac11)
• enforce update budget guardrails and preserve currency in media … (#1140) (1e1aa6d)
• harden login redirect validation and test-auth gate (F-06, F-02) (#1141) (cd56496)
• raise on anomalous empty format responses instead of silent return [] (#1167) (149f58b)
• replace dict subscript with attribute access on FormatId objects (#1166) (80c5776)
• require authenticated principal for task management tools (#1139) (ff1006d)
• resolve CI failures on PR #1143 (5c5f34f)
• use request.script_root for dynamic URL prefixing (#1160) (0b304ed)
• video/display format template appears unselected after saving product (#1168) (9e395c5)

Performance Improvements

• ci: parallelize integration tests + local mock creative agent (#1148) (9c65617)

Code Refactoring

• AdapterConfigRepository + GAM service account auth consolidation (#1171) (5e89166)

Documentation

• add architecture patterns reference for contributors (#1145) (2d61ea1)

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