feat(Explorer): Enhance metric extraction, source transparency, and UI display

- **Standardization & Formula Logic:** Fixed NameError/SyntaxError in formula parser; added support for comments and capitalized placeholders.
- **Source URL Tracking:** Extended DB schema and cascade logic to store and track specific source URLs.
- **Frontend & UI:**
  - Added 'Standardized Potential' display in Inspector.
  - Added clickable source link with icon.
  - Fixed Settings tab layout collapse (flex-shrink-0).
- **Export Capabilities:**
  - Single-company JSON export now includes full quantitative metadata.
  - New global CSV export endpoint /api/companies/export.
- **System Integrity:**
  - Fixed Notion sync typo ('Stanardization').
  - Corrected Nginx proxy routing and FastAPI route ordering.
  - Ensured DB persistence via explicit docker-compose volume mapping.

docker-compose.yml

@@ -64,6 +64,8 @@ services:
     volumes:
       # Sideloading: Source Code (Hot Reload)
       - ./company-explorer:/app
+      # DATABASE (Persistence)
+      - ./companies_v3_fixed_2.db:/app/companies_v3_fixed_2.db
       # Keys
       - ./gemini_api_key.txt:/app/gemini_api_key.txt
       - ./serpapikey.txt:/app/serpapikey.txt
@@ -72,6 +74,8 @@ services:
       - ./Log_from_docker:/app/logs_debug
     environment:
       - PYTHONUNBUFFERED=1
+    ports:
+      - "8000:8000"
     # Port 8000 is internal only
 
   # --- B2B MARKETING ASSISTANT ---