phase 3.3: docs — point README.md at patch-preservation governance

Two additions:

1. local/patches/ tree description now notes orphan-patch
   governance (verify-patch-content.sh + decision tree in AGENTS.md).
   Operators looking at the patches tree get the pointer to the
   audit doc.

2. Documentation list in README.md adds two new doc pointers:
   - PATCH-PRESERVATION-AUDIT-2026-07-12.md
   - COLLISION-DETECTION-STATUS.md

Operator visibility only — no functional change to governance.

README.md

@@ -203,6 +203,8 @@ Red Bear OS operates under strict discipline. Full policies: [`local/AGENTS.md`]
 - [Greeter & Login](local/docs/GREETER-LOGIN-IMPLEMENTATION-PLAN.md) — Native greeter, auth daemon, session launch
 - [DRM Modernization](local/docs/DRM-MODERNIZATION-EXECUTION-PLAN.md) — DRM/KMS display and render maturity
 - [USB Plan](local/docs/USB-IMPLEMENTATION-PLAN.md) — USB stack design and implementation
+- [Patch Preservation Audit](local/docs/PATCH-PRESERVATION-AUDIT-2026-07-12.md) — orphan-patch governance, Round 1-3 audit results, SUPERSEDED.md log
+- [Collision Detection Status](local/docs/COLLISION-DETECTION-STATUS.md) — runtime collision-detection current state
 - [Wi‑Fi Plan](local/docs/WIFI-IMPLEMENTATION-PLAN.md) — Wireless architecture and driver plan
 - [Bluetooth Plan](local/docs/BLUETOOTH-IMPLEMENTATION-PLAN.md) — Bluetooth stack design
 - [Build Cache](local/docs/BUILD-CACHE-PLAN.md) — Content-hash (BLAKE3) build cache system
@@ -222,6 +224,12 @@ local/
 ├── sources/    # Local forks of core components (kernel, relibc, base, bootloader, …)
 ├── recipes/    # Custom packages — drivers, GPU stack, system daemons, branding
 ├── patches/    # Durable changes to upstream source trees
+│   └── (orphan-patch governance: every patch must correspond to work
+│        present in the matching fork source tree. `verify-patch-content.sh`
+│        enforces this on every build preflight. See
+│        `local/docs/PATCH-PRESERVATION-AUDIT-2026-07-12.md` for the audit
+│        and AGENTS.md § "Orphan-Patch Supersession Decision Tree" for the
+│        decision flow when an orphan is detected.)
 ├── docs/       # Integration and planning documentation
 └── scripts/    # Build, test, validation, and release tooling
 ```