docs+cleanup: CURRENT-STATE.md and dead L86/L88 ablation switches removed (L131)

One current-state page (shipping behaviour, references with sources, gaps, verification, closed lines), linked from
CLAUDE.md. Removes the L86/L88 passage/boundary ablation switches and the unused legacy route-grade audit; inventory
of every kept switch in the report. Output identical: 24/24 + 18/18 hashes, fast tier, walk/seam audits, UE host
build; timing unchanged (-0.2%, CI spans 0). No Source/ changes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016dhxM43dnWvUu2B5Ph1iG1

CLAUDE.md

@@ -10,6 +10,7 @@ then wait for his results / pasted errors. Same for in-editor checks — ask for
 try to run anything.
 
 ## Read first (in order, load only what the task needs)
+- **[CURRENT-STATE.md](CURRENT-STATE.md) — current shipping snapshot and verification entry point.**
 - **[CODEMAP.md](CODEMAP.md) — ALWAYS.** Navigation: what it is, data-flow (§2), symbol→`file:line`
   index (§3), "I want to change X → go here" (§5), conventions & gotchas (§6). Trust **symbol names
   over line numbers** (lines drift).