Initial commit: BLIGHT: CUE

Webhook listener that monitors Gitea repos for BLIGHT: triggers in
markdown files, processes them via Gemini 2.5 Flash-Lite, and writes
results back in-place.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

config.py

@@ -0,0 +1,10 @@
+import os
+from dotenv import load_dotenv
+
+load_dotenv()
+
+GITEA_URL = os.environ["GITEA_URL"].rstrip("/")
+GITEA_TOKEN = os.environ["GITEA_TOKEN"]
+GEMINI_API_KEY = os.environ["GEMINI_API_KEY"]
+WEBHOOK_SECRET = os.environ["WEBHOOK_SECRET"]
+WEBHOOK_PORT = int(os.environ.get("WEBHOOK_PORT", 5010))