feat: enhance revision logic with fuzzy matching, dynamic material loading, and schema automation

- Improved RevisionComparator with fuzzy matching (RapidFuzz) and dynamic DB material loading
- Enhanced regex patterns for better size/material extraction
- Initialized Alembic for schema migrations and created baseline migration
- Added entrypoint.sh for automated migrations in Docker
- Fixed SyntaxError in fitting_classifier.py
- Updated test suite with new functionality tests

backend/entrypoint.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+set -e
+
+# Wait for DB to be ready (optional, but good practice if not handled by docker-compose)
+# /wait-for-it.sh db:5432 --
+
+# Run migrations
+echo "Running database migrations..."
+alembic upgrade head
+
+# Start application
+echo "Starting application..."
+exec "$@"