fix(canary): reuse the healthy shared DeepSeek proxy on 18036

Stable 103 already runs deepseek-no-think on 18036. Require that contract
instead of demanding a free port, so canary install does not fight production.

Co-authored-by: Cursor <cursoragent@cursor.com>

release-gate/release-script.test.mjs

@@ -159,6 +159,7 @@ test('production canary keeps stable 8081 live and switches only after verified
   const deepseekCompatStart = source.indexOf(
     'Start the DeepSeek tool-round compatibility proxy on 18036',
   );
+  assert.match(source, /Reuse the already healthy DeepSeek compatibility proxy/);
   const proxyStart = source.indexOf('Start the fail-closed identity router on 18082');
   const tunnelStart = source.indexOf('Start the isolated 105 reverse tunnel on 19082');
   const edgeSwitch = source.indexOf(

scripts/release-portal-canary-prod.sh

@@ -206,7 +206,9 @@ ssh -o BatchMode=yes -o ConnectTimeout=15 "${HOST}" \
    && test -x '${CANARY_AIDER_BIN}' \
    && curl -fsS http://127.0.0.1:8081/api/status >/dev/null \
    && ! lsof -nP -iTCP:${CANARY_PROXY_PORT} -sTCP:LISTEN >/dev/null 2>&1 \
-   && ! lsof -nP -iTCP:${DEEPSEEK_COMPAT_PORT} -sTCP:LISTEN >/dev/null 2>&1 \
+   && { ! lsof -nP -iTCP:${DEEPSEEK_COMPAT_PORT} -sTCP:LISTEN >/dev/null 2>&1 \
+        || curl -fsS --max-time 5 http://127.0.0.1:${DEEPSEEK_COMPAT_PORT}/health \
+             | grep -q '"deepseekThinking":"disabled"'; } \
    && ! lsof -nP -iTCP:18081 -sTCP:LISTEN >/dev/null 2>&1 \
    && ! lsof -nP -iTCP:18015 -sTCP:LISTEN >/dev/null 2>&1 \
    && /opt/homebrew/bin/docker inspect goosed-prod-1 >/dev/null \
@@ -536,6 +538,9 @@ done
   sh -lc 'test -x /usr/local/bin/node && test -f /opt/portal/mindspace-sandbox-mcp.mjs'
 
 say "Start the DeepSeek tool-round compatibility proxy on 18036"
+if deepseek_compat_healthy; then
+  say "Reuse the already healthy DeepSeek compatibility proxy on ${DEEPSEEK_COMPAT_PORT}"
+else
 cat > "${DEEPSEEK_COMPAT_PLIST}" <<EOF
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
@@ -564,6 +569,7 @@ for _ in $(seq 1 30); do
   sleep 1
 done
 deepseek_compat_healthy
+fi
 "${DOCKER_BIN}" exec goosed-prod-canary \
   sh -lc "curl -fsS --max-time 5 http://host.docker.internal:${DEEPSEEK_COMPAT_PORT}/health \
     | grep -q '\"deepseekThinking\":\"disabled\"'"