Update README with enhanced database and migration documentation

README.md

@@ -133,6 +133,27 @@ The application is configured to use SQLite with the following database location
 
 The application automatically selects the first available and writable location from this list.
 
+### Enhanced Database Reliability
+
+The application includes several features to ensure robust and reliable database operations:
+
+1. **Multi-path discovery**: Automatically finds and uses the first writable database location
+2. **Directory creation**: Creates database directories if they don't exist
+3. **Database initialization**: Initializes the database with required tables using both SQLAlchemy and direct SQLite
+4. **Connection retry logic**: Automatically retries database connections with exponential backoff
+5. **SQLite optimizations**: Uses WAL journal mode and other SQLite performance optimizations
+6. **Error diagnostic logging**: Comprehensive error logging for easier troubleshooting
+7. **Fallback mechanisms**: Falls back to direct SQLite operations if SQLAlchemy fails
+
+### Alembic Migration Enhancements
+
+Alembic migrations include robust error handling and initialization:
+
+1. **Pre-migration checks**: Verifies database directories exist and are writable
+2. **Auto-creation**: Creates necessary directories and initializes the database file
+3. **Retry logic**: Implements retry logic for migration operations
+4. **Detailed diagnostics**: Provides detailed error information for failed migrations
+
 ## Getting Started
 
 ### Installation
@@ -149,6 +170,11 @@ The application automatically selects the first available and writable location
 alembic upgrade head
 ```
 
+The migration process will automatically:
+1. Create the database directory if it doesn't exist
+2. Initialize the database file if needed
+3. Apply all migrations with retry logic for reliability
+
 ### Starting the Application
 
 ```