fix(docs): skip auto-generated files in validation

Add check to skip auto-generated files (with '-- AUTOMATICALLY GENERATED FILE'
marker) in validate-required-tags.sh, matching check-doc-coverage.sh behavior.

This fixes validation errors for src/version.sql which is generated during
build from src/version.template (which is properly documented).

Validation now correctly:
- Skips version.sql (auto-generated, in .gitignore)
- Validates version.template (source with documentation)
- Achieves 100% coverage without errors

Author: tobyhede

tasks/validate-required-tags.sh

@@ -13,6 +13,11 @@ errors=0
 warnings=0
 
 for file in $(find src -name "*.sql" -not -name "*_test.sql"); do
+  # Skip auto-generated files
+  if grep -q "^-- AUTOMATICALLY GENERATED FILE" "$file" 2>/dev/null; then
+    continue
+  fi
+
   # For each CREATE FUNCTION, check tags
   functions=$(grep -n "^CREATE FUNCTION" "$file" 2>/dev/null | cut -d: -f1 || echo "")