Add data/dev and data/prod directories for db storage

.gitignore

@@ -28,9 +28,20 @@ report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
 *.tsbuildinfo
 
 # SQLite databases
-*.db
-*.db-shm
-*.db-wal
+# Comment out root-level patterns - using data dirs instead
+# *.db
+# *.db-shm
+# *.db-wal
+
+# Data directories
+data/dev/*.db
+data/dev/*.db-shm
+data/dev/*.db-wal
+data/prod/*.db
+data/prod/*.db-shm
+data/prod/*.db-wal
+!data/dev/.gitkeep
+!data/prod/.gitkeep
 
 # IntelliJ based IDEs
 .idea