phase 6.6: update PATCH-PRESERVATION-AUDIT with Round 7 outcomes

Updates the cumulative reduction table with Phase 6.3-6.5 results:
- Phase 6.3 local-patches archive structure documented (Round 7)
- Phase 6.4 operator-decision automation (--report action)
- Phase 6.5 selftest with 5 regression cases

Round 7 work added:
- 121 active patches (was 122 — synthetic test orphan cleaned up)
- 159 archived in legacy-superseded-2026-07-12/
- 62 archived in legacy-absorbed-2026-07-12/
- 0 orphans

Verified that the operator's recent base-fork revert (which
removed the Round 5 force-pushes from origin) does NOT break
build-system state: local work lives in local/sources/<fork> and
the audit still passes. Base fork push STILL DEADLOCKED at the
gitea receive.shallowUpdate level; operator-side fix via
unblock-base-push.sh path-a/b/c.

local/docs/PATCH-PRESERVATION-AUDIT-2026-07-12.md

@@ -266,15 +266,22 @@ Three follow-on improvements after Round 3 closed:
   After Phase 3.0-3.2: 121 patches,    0 orphans (0%) — Round 3
   After Phase 4.3:     119 patches,    0 orphans (0%) — Round 5
   After Phase 5.2:     122 patches,    0 orphans (0%) — Round 6
+  After Phase 6.3-6.5: 121 patches,    0 orphans (0%) — Round 7
+                       (cleaned up 1 synthetic test orphan)
 
 Cumulative work to date: 132 patches archived as SUPERSEDED or
-INTEGRATED, 5 files cleaned up, 6 fork branches advanced to origin,
+INTEGRATED, 5 files cleaned up, 6 fork branches advanced to origin
+(Round 5; operator subsequently reverted some; local work is
+preserved in local/sources/<fork> regardless of origin state),
 6 patches re-extracted from legacy-absorbed for test-recipe
 references (Round 6 Phase 5.2), collision detection extended to
 `[[package]].files` field (Phase 5.1) with 8 regression tests
-(Phase 5.4), operator-side base-push-unblock helper (Phase 5.3).
+(Phase 5.4), operator-side base-push-unblock helper (Phase 5.3),
+local-patches-archive structure documented (Phase 6.3), operator-
+decision automation in verify-patch-content (Phase 6.4), and 5
+regression tests for the audit algorithm (Phase 6.5).
 Build system now has 100% patch preservation + collision detection
-+ 4-check pre-push hook + operator-side fixes for the base-push
++ 7-check pre-push hook + operator-side fixes for the base-push
 deadlock.
 
 ## Out-of-scope for Phase 1/2/3/4/5 (forward work)