feat: implement t-604 keyword prompt moderation

config/settings.py

@@ -117,6 +117,14 @@ IMAGE_URL_MAX_REDIRECTS = env_int("IMAGE_URL_MAX_REDIRECTS", 3)
 IMAGE_URL_CONNECT_TIMEOUT_SECONDS = env_int("IMAGE_URL_CONNECT_TIMEOUT_SECONDS", 10)
 IMAGE_URL_READ_TIMEOUT_SECONDS = env_int("IMAGE_URL_READ_TIMEOUT_SECONDS", 60)
 RECHARGE_MAX_AMOUNT_CNY = env_decimal("RECHARGE_MAX_AMOUNT_CNY", "100000.00")
+MODERATION_ENABLED = env_bool("MODERATION_ENABLED", False)
+MODERATION_PROVIDER = os.environ.get("MODERATION_PROVIDER", "keyword").strip().lower()
+MODERATION_FAIL_CLOSED = env_bool("MODERATION_FAIL_CLOSED", True)
+MODERATION_BLOCK_ON_REVIEW = env_bool("MODERATION_BLOCK_ON_REVIEW", False)
+MODERATION_CACHE_VERSION_KEY = os.environ.get(
+    "MODERATION_CACHE_VERSION_KEY",
+    "moderation:sensitive_words:version",
+)
 
 
 # Application definition
@@ -135,6 +143,7 @@ INSTALLED_APPS = [
     'apps.portal',
     'apps.billing',
     'apps.ai',
+    'apps.moderation',
     'apps.api',
 ]