fix(ce): Resolve database schema mismatch and restore docs

- Fixed a critical  in the company-explorer by forcing a database re-initialization with a new file (). This ensures the application code is in sync with the database schema.
- Documented the schema mismatch incident and its resolution in MIGRATION_PLAN.md.

- Restored and enhanced BUILDER_APPS_MIGRATION.md by recovering extensive, valuable content from the git history that was accidentally deleted. The guide now again includes detailed troubleshooting steps and code templates for common migration pitfalls.

company-explorer/backend/database.py

@@ -139,6 +139,7 @@ class EnrichmentData(Base):
     source_type = Column(String) # "website_scrape", "wikipedia", "google_serp"
     content = Column(JSON)       # The raw data
     is_locked = Column(Boolean, default=False) # Manual override flag
+    wiki_verified_empty = Column(Boolean, default=False) # NEW: Mark Wikipedia as definitively empty
     
     created_at = Column(DateTime, default=datetime.utcnow)
     updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)