Upgrade local web gateway with structured YouTube support

platform/mcp/Dockerfile.web

@@ -1,7 +1,11 @@
 FROM python:3.13-slim
 
 ARG MCP_PROXY_VERSION=0.12.0
-RUN pip install --no-cache-dir "mcp-proxy==${MCP_PROXY_VERSION}" "mcp>=1.17,<2"
+ARG YT_DLP_VERSION=2026.7.4
+RUN pip install --no-cache-dir \
+    "mcp-proxy==${MCP_PROXY_VERSION}" \
+    "mcp>=1.17,<2" \
+    "yt-dlp==${YT_DLP_VERSION}"
 
 RUN useradd --system --uid 10001 --create-home --home-dir /app mcp
 COPY web-search/web_search_mcp.py /app/web_search_mcp.py

platform/mcp/compose.yaml

@@ -30,10 +30,17 @@ services:
     environment:
       TINYSEARCH_MCP_URL: http://tinysearch:8000/mcp
       SEARXNG_URL: http://searxng:8080
-      WEB_SEARCH_BUDGET_MAX_RELATED: "6"
+      WEB_SEARCH_BUDGET_MAX_RELATED: "3"
+      YOUTUBE_TIMEOUT: "45"
     depends_on:
       tinysearch:
         condition: service_started
+    healthcheck:
+      test: ["CMD", "python", "-c", "import socket; s=socket.create_connection(('127.0.0.1', 8000), 2); s.close()"]
+      interval: 30s
+      timeout: 5s
+      retries: 5
+      start_period: 15s
 
   searxng:
     <<: *tool-common