chore: add db migration helper scripts

migrate.bat

@@ -0,0 +1,23 @@
+@echo off
+setlocal
+
+if "%~1"=="" (
+    echo Usage: migrate.bat path\to\migration.sql
+    exit /b 1
+)
+
+set SQL_FILE=%~1
+
+if not exist "%SQL_FILE%" (
+    echo Error: File "%SQL_FILE%" does not exist.
+    exit /b 1
+)
+
+echo Running %SQL_FILE% against pragativeer_db...
+docker exec -i pragativeer_db psql -U pragativeer_admin -d pragativeer_prod < "%SQL_FILE%"
+
+if %ERRORLEVEL% equ 0 (
+    echo Migration applied successfully!
+) else (
+    echo Migration failed!
+)