docs: add Doxygen configuration and validation scripts

Author: tobyhede

tasks/validate-required-tags.sh

@@ -13,11 +13,6 @@ 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 "")