Add project documentation and initial analysis reports

docs/data-models-app.md

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+# Data Models
+
+## Database Schema
+
+The project uses PostgreSQL managed via SQLAlchemy.
+
+> **Note**: This is a high-level summary from a Quick Scan. Run a Deep Scan to generate full schema documentation.
+
+## Tables
+
+Models are defined in `app/models.py`. Key entities likely include:
+
+- **Product** (or Item): The object being tracked.
+- **Price**: Historical price points.
+- **(Others pending deep scan)**
+
+## Migrations
+
+Database schema changes are managed by Alembic. Migration scripts are located in `app/alembic/versions/`.