chore: sync Cargo.lock to v0.7.12 + gitignore bundled DB tools

.gitignore

@@ -38,3 +38,13 @@ docs/superpowers/
 .env
 !.env.example
 .worktrees/
+
+# Bundled DB client tools (built/downloaded during release, never committed)
+desktop/src-tauri/resources/pg_tools/pg_dump
+desktop/src-tauri/resources/pg_tools/pg_restore
+desktop/src-tauri/resources/pg_tools/psql
+desktop/src-tauri/resources/pg_tools/libpq.5.dylib
+desktop/src-tauri/resources/mysql_tools/mariadb
+desktop/src-tauri/resources/mysql_tools/mariadb-dump
+desktop/src-tauri/resources/mysql_tools/libcrypto.3.dylib
+desktop/src-tauri/resources/mysql_tools/libssl.3.dylib

desktop/src-tauri/Cargo.lock

@@ -1783,7 +1783,7 @@ dependencies = [
 
 [[package]]
 name = "gridline"
-version = "0.7.11"
+version = "0.7.12"
 dependencies = [
  "bytes",
  "chrono",