docs: CC6b-PRE re-review residuals R1/R2 + cross-branch renumbering

R1: the unsound elided-ctor-byte argument survived at its canonical
citation site (ChargenPreviewEntityBuilder's class doc, which the two
corrected docs point at) and in the ledger row's Deliverables column,
which contradicted its own review-status column. Both now carry the real
evidence: InitializePage @0x0047FDD0 writes an explicit m_bZoomedIn = 0
at 0x004802C3.

R2: the verified 180-degree initial heading (m_fCurHeading = 180f at
0x00480235 + SetPlayerHeading at 0x0048023F, cross-confirmed at
gmBarberUI::PostInit and the summary page) now has a durable home in the
CC6b-mount OWED list — without it the mount half ships a character
facing away from the camera.

Merge prep: the branch-local TS-82 renumbered to TS-84 (the CC4 branch
independently allocated TS-82 and landed first) and the branch-local
ISSUES #402 renumbered to #403 (same collision, same rule), with the
Core doc reference updated.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/ISSUES.md

@@ -24,7 +24,7 @@ What does NOT go here:
 - Every session: scan OPEN issues at start; promote/close anything we touched during the session before ending.
 - Promoting to a Phase: mark as `DONE (promoted to Phase X)` + commit SHA where the Phase entry landed.
 
-## #402 — Consolidate RetailAnimationCyclePlayback into LiveEntityAnimationPresenter's legacy branch
+## #403 — Consolidate RetailAnimationCyclePlayback into LiveEntityAnimationPresenter's legacy branch
 
 **Status:** OPEN (post-CC consolidation follow-up)
 **Severity:** LOW