Fingerprint capture

Fingerprint capture — contract and behavior

• FINGERPRINT_CAPTURE.md is the source of truth for the roughly 300 surfaces grouped across sections A through P.
• Coverage includes JS hooks, canvas/GPU/audio, CDP events, off-browser network traces, host state, visual evidence, workers, provenance, media/DRM, runtime, crash, memory, display, and trust boundaries.
• Every inventory row is marked wired, partial, or todo; only wired fields should be treated as guaranteed evidence.
• buildDumpPayload and the merged recordings/<label> bundle define what actually lands for one WSession.