fix(energy): checkpoint validated drill pagination and read-only preview

Co-authored-by: HiFox Agent <agents-noreply@hifox.com>

.env.local.example

@@ -0,0 +1,12 @@
+# Copy to .env.local; never commit real credentials. Environment values win.
+HYDROGEN_DB_HOST=
+HYDROGEN_DB_PORT=3306
+HYDROGEN_DB_USER=
+HYDROGEN_DB_PASSWORD=
+HYDROGEN_DB_NAME=
+# Optional legacy/electric business database; use a database-level read-only user.
+DB_HOST=
+DB_PORT=3306
+DB_USER=
+DB_PASSWORD=
+DB_NAME=