Complete persisted Cursor model compatibility

[ymichael]

Human comments

What was wrong

Cursor's parameterized ACP picker accepts current bare model IDs, but six families persisted by the historical Cursor picker use spellings that generic effort/thinking collapse cannot derive. The compatibility translator added in PR #2432 therefore produced IDs absent from Cursor's live catalog, and affected sessions failed during construction before the first prompt.

What changed

Apply six explicit Cursor-only legacy-family renames after the existing variant collapse at the shared ACP session-construction boundary. No rows are rewritten, and current bare IDs, auto/default, reasoning, service tier, non-Cursor ACP, and non-parameterized behavior remain unchanged. A fixture-backed table test now checks all 34 historical persisted families against Cursor's accepted parameterized catalog, with a representative renamed Claude resume case through the bridge. HOST_DAEMON_PROTOCOL_VERSION remains 170 because the server/daemon wire contract did not change. There is no CLI, guide, documentation, or public plugin API change. The plugin SDK is bumped to 0.4.22 because 0.4.21 was published after the initial local publication check and cannot carry this changed ACP runtime.

How you verified

Before the production change, the fixture-backed test failed with 1 failed / 19 passed and identified exactly six incompatible translations; a live representative flow translated to rejected claude-4.6-sonnet. Afterward, that flow translated to accepted claude-sonnet-4-6, and the all-family live probe reported legacy-families=34, accepted-parameterized=35, and missing=[].

• pnpm exec turbo run test --filter=@bb/provider-bridge-acp --force — 17 files, 295 tests passed.
• pnpm exec turbo run typecheck --filter=@bb/provider-bridge-acp --filter=@get-bb/plugin-sdk --filter=bb-plugin-provider-acp --force — 6 tasks passed.
• pnpm exec turbo run build --filter=@get-bb/plugin-sdk --force — 2 tasks passed; 17 runtime entries built.
• node packages/plugin-sdk/scripts/check-npm-version-guard.mjs — reproduced CI's failure at published 0.4.21, then passed after the 0.4.22 bump.
• Targeted formatting and git diff --check origin/main..HEAD passed.

Fixes #1688

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