Add TLC Search app to stack

Complete TLC stack now includes:
- rss-bridge: YouTube to RSS converter
- feed-master: RSS feed aggregator
- search: TLC Search Flask app (port 8088)

Requires Elasticsearch and Qdrant backends configured in .env

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

stacks/tlc/.env.template

@@ -0,0 +1,12 @@
+# Elasticsearch configuration
+ELASTIC_URL=${ELASTIC_URL}
+ELASTIC_INDEX=${ELASTIC_INDEX:-tlc-egre}
+ELASTIC_API_KEY=${ELASTIC_API_KEY}
+ELASTIC_VERIFY_CERTS=${ELASTIC_VERIFY_CERTS:-0}
+
+# Qdrant configuration
+QDRANT_URL=${QDRANT_URL}
+QDRANT_COLLECTION=${QDRANT_COLLECTION:-tlc-captions-full}
+QDRANT_VECTOR_NAME=${QDRANT_VECTOR_NAME:-}
+QDRANT_VECTOR_SIZE=${QDRANT_VECTOR_SIZE:-1024}
+QDRANT_EMBED_MODEL=${QDRANT_EMBED_MODEL:-BAAI/bge-large-en-v1.5}