Update add_user.py to use configurable database path

- Use DATABASE_PATH and DATABASE_URL environment variables
- Consistent with app.py and aerich_config.py configuration
- Add environment variable documentation to help text
- Default remains database/raggr.db for backward compatibility

Usage:
  DATABASE_PATH=dev.db python add_user.py list

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

add_user.py

@@ -1,16 +1,21 @@
 # GENERATED BY CLAUDE
 
+import os
 import sys
 import uuid
 import asyncio
 from tortoise import Tortoise
 from blueprints.users.models import User
 
+# Database configuration with environment variable support
+DATABASE_PATH = os.getenv("DATABASE_PATH", "database/raggr.db")
+DATABASE_URL = os.getenv("DATABASE_URL", f"sqlite://{DATABASE_PATH}")
+
 
 async def add_user(username: str, email: str, password: str):
     """Add a new user to the database"""
     await Tortoise.init(
-        db_url="sqlite://database/raggr.db",
+        db_url=DATABASE_URL,
         modules={
             "models": [
                 "blueprints.users.models",
@@ -56,7 +61,7 @@ async def add_user(username: str, email: str, password: str):
 async def list_users():
     """List all users in the database"""
     await Tortoise.init(
-        db_url="sqlite://database/raggr.db",
+        db_url=DATABASE_URL,
         modules={
             "models": [
                 "blueprints.users.models",
@@ -94,6 +99,11 @@ def print_usage():
     print("\nExamples:")
     print("  python add_user.py add ryan ryan@example.com mypassword123")
     print("  python add_user.py list")
+    print("\nEnvironment Variables:")
+    print("  DATABASE_PATH  - Path to database file (default: database/raggr.db)")
+    print("  DATABASE_URL   - Full database URL (overrides DATABASE_PATH)")
+    print("\n  Example with custom database:")
+    print("  DATABASE_PATH=dev.db python add_user.py list")
 
 
 async def main():