PTP: ship hardware-timestamped timing engine in v0.1.1 production fir…

…mware (#98)

Ship ARStack Studio / ESP32-P4 v0.1.1 production integration with PTP-P2, firmware recovery/update flow, Windows packaging, lifecycle gates, and demo UX refinements.

Merge PR #79: ARStack Studio P0 4I+4V production baseline

P0 productionization closure for ARStack Studio 4I+4V / 4000 fps / 1 ASDU / 64-byte payload.

Acceptance basis:
- exact-head CI completed successfully across Studio, embedded, release, security/evidence and RC2 policy workflows;
- physical automated retained run completed 3600 s at 4000 fps with missed=0, txFailures=0, healthReconnects=0, automaticStarts=0;
- 10/10 Start/Stop cycles and live control operations passed;
- independent SV capture spot-check confirmed expected MAC, APPID, VLAN/PCP, svID, confRev, 1 ASDU, 64-byte seqData, continuous smpCnt including 3999->0 wraps, and smpSynch=0;
- blocker runtime fix remains preserved at acd8152; final head adds only AGENTS.md contract synchronization.

Residual strict-lab matrix items are documented as deferred/non-blocking under the product-owner pragmatic P0 release decision; no unexecuted case is represented as a physical PASS.