Fix: Quota logic for admins and updated firestore rules

Emergency Fix: Resolve NameError in Anchor Validation and Sync pedagogical prompts (V5.13.16)

V5.11.3 - EMERGENCY SECURITY FIX: Disable local credential files and purge secrets

V5.11.2 - Fix Firebase initialization in verify_token

V285.5: Multi-image ordering implementation and pedagogical grading logic

V5.10.1: Added 'המצאה', 'טעות שלי', 'מתנצל' to Blacklist & Verified 4 Layers

fix: Robust Firebase initialization with environment variable support and lazy loading

fix: Robust server-side auth fallback for DEV environment

Security Hardening: Firebase Auth + Quota V2 Enforcement

Merge user security changes

V5.8.6: Signed URLs, math improvements, and orchestrator refinements

Fix: Clean production deployment with sse-starlette