💾 feat: Add Memory Configuration Options for CI unit tests

- responding to PR feedback from Copilot

api/test/.env.test.example

@@ -12,4 +12,6 @@ BAN_VIOLATIONS=true
 BAN_DURATION=7200000
 BAN_INTERVAL=20
 
+# NODE_MAX_OLD_SPACE_SIZE is only used as a Docker build argument.
+# Node.js does NOT recognize this environment variable for heap size.
 NODE_MAX_OLD_SPACE_SIZE=6144

api/test/jestSetup.js

@@ -16,5 +16,3 @@ process.env.ALLOW_EMAIL_LOGIN = 'true';
 // This can be overridden in individual tests if needed
 jest.setTimeout(30000);
 process.env.OPENAI_API_KEY = 'test';
-
-process.env.NODE_MAX_OLD_SPACE_SIZE = '6144';