v0.20.55

What changed

• Merge feat/COS-FP-A — synthetic FP harness + L2 threshold calibration (+ distribution fix)
• docs(COS-FP-A): reviewer-accepted evidence with distribution-fix deltas
• docs(COS-FP-A): declare bundled assets report in Production ownership
• fix(COS-FP-A): serve bundled cosine-fp report in shipped tarball
• fix(COS-FP-A): revert unrelated BREAKER re-export formatting churn in src/config.ts
• docs(COS-FP-A): record live Playwright validation of the cosine-FP card
• docs(COS-FP-A): fix Production ownership field for scope-check parsing
• feat(COS-FP-A): synthetic FP harness + L2 threshold calibration
• docs(DEFERRED): record DOC-0a landed (692c78a, v0.20.54)

Install: `pi update --extensions`