feat(operations): הוספת codex_local לסרגל-חירום + סקריפט A/B-benchmark

- adapter_profiles.py: codex_local.default_model = gpt-5.5 (עדכון מ-gpt-5.3-codex)
- agent-adapters-panel.tsx: כפתור "העבר הכל ל-Codex ⚡" בסרגל-החירום (ב-G/Codex fallback)
- operations.ts: הוספת codex_local לדוקומנטציה של useAdapterMigrate
- ab_halacha_codex.py: סקריפט A/B חדש — חילוץ הלכות דרך codex exec/gpt-5.5 (non-destructive benchmark)
- SCRIPTS.md: תיעוד ab_halacha_codex.py

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

web-ui/src/lib/api/operations.ts

@@ -231,7 +231,7 @@ export function useResetAgentSession() {
 
 // ── Agent adapter migration ────────────────────────────────────────────────
 // Migrate an agent (or "all") between run-engines (claude_local / gemini_local /
-// deepseek_local) in BOTH companies. Host-side (runs scripts/migrate_agent_adapter.py
+// deepseek_local / codex_local) in BOTH companies. Host-side (runs scripts/migrate_agent_adapter.py
 // via the court-fetch bridge), so the script's exit code + output are relayed so
 // the panel can render preflight warnings. A non-zero exit on a "check" is an
 // informative refusal, not a transport error — callers inspect exit_code.