refactor: Move schema constants to module level

- Move REGDEF_V1_SCHEMA and REGDEF_V2_SCHEMA to module-level constants
- Add APPDEF_SCHEMA constant for consistency
- Matches existing pattern for schema constants (lines 18-21)

This ensures consistent code style throughout the file.

Author: BackendBits

scripts/build_env/main.py

@@ -19,6 +19,9 @@
 CLOUD_SCHEMA = "schemas/cloud.schema.json"
 NAMESPACE_SCHEMA = "schemas/namespace.schema.json"
 ENV_SPECIFIC_RESOURCE_PROFILE_SCHEMA = "schemas/resource-profile.schema.json"
+APPDEF_SCHEMA = "schemas/appdef.schema.json"
+REGDEF_V1_SCHEMA = "schemas/regdef.schema.json"
+REGDEF_V2_SCHEMA = "schemas/regdef-v2.schema.json"
 
 
 def prepare_folders_for_rendering(env_name, cluster_name, source_env_dir, templates_dir, render_dir,
@@ -275,11 +278,8 @@ def validate_appregdefs(render_dir, env_name):
             logger.info(f"No AppDef YAMLs found in {appdef_dir}")
         for file in appdef_files:
             logger.info(f"AppDef file: {file}")
-            validate_yaml_by_scheme_or_fail(file, "schemas/appdef.schema.json")
+            validate_yaml_by_scheme_or_fail(file, APPDEF_SCHEMA)
 
-    REGDEF_V1_SCHEMA = "schemas/regdef.schema.json"
-    REGDEF_V2_SCHEMA = "schemas/regdef-v2.schema.json"
-    
     if os.path.exists(regdef_dir):
         regdef_files = findAllYamlsInDir(regdef_dir)
         if not regdef_files: