feat(db-load-xml, db-load-git): add -UpdateDB flag to combine load + update in one Designer run

Closes #8 — adds /UpdateDBCfg parameter support so users can load config
and update database in a single 1C Designer invocation instead of two.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/skills/db-load-xml/scripts/db-load-xml.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-# db-load-xml v1.0 — Load 1C configuration from XML files
+# db-load-xml v1.1 — Load 1C configuration from XML files
 # Source: https://github.com/Nikolay-Shirokov/cc-1c-skills
 
 import argparse
@@ -62,6 +62,7 @@ def main():
         choices=["Hierarchical", "Plain"],
         help="File format (default: Hierarchical)",
     )
+    parser.add_argument("-UpdateDB", action="store_true", help="Also update database configuration after load")
     args = parser.parse_args()
 
     # --- Resolve V8Path ---
@@ -138,6 +139,10 @@ def main():
         elif args.AllExtensions:
             arguments.append("-AllExtensions")
 
+        # --- UpdateDB ---
+        if args.UpdateDB:
+            arguments.append("/UpdateDBCfg")
+
         # --- Output ---
         out_file = os.path.join(temp_dir, "load_log.txt")
         arguments += ["/Out", out_file]