Infrastructure: Implement master/dev/vX branching, save git path, and fix username casing

backend/database.py

@@ -2,10 +2,16 @@ from sqlalchemy import create_engine
 from sqlalchemy.orm import sessionmaker, declarative_base
 import os
 
-# Create data directory if it doesn't exist
-os.makedirs("data", exist_ok=True)
+# Get absolute path for the backend directory
+BASE_DIR = os.path.dirname(os.path.abspath(__file__))
+DATA_DIR = os.path.join(BASE_DIR, "data")
 
-SQLALCHEMY_DATABASE_URL = "sqlite:///./data/inventory.db"
+# Create data directory if it doesn't exist in the backend folder
+os.makedirs(DATA_DIR, exist_ok=True)
+
+# Handle absolute path for SQLite (needs 4 slashes on Unix)
+db_path = os.path.join(DATA_DIR, "inventory.db")
+SQLALCHEMY_DATABASE_URL = f"sqlite:////{db_path}"
 
 # connect_args={"check_same_thread": False} is required for SQLite in FastAPI/Starlette
 engine = create_engine(