chore: baseline V8.10.0-dev.1 with v8_workflows type-mapping fix and trade-pro spec

- SiteForge Enterprise V8.10.0-dev.1 upstream source (210 tests)
- Fix: v8_workflows._mapped_input now reads both 类型/分类 columns so WXR
  imports keep post/product types instead of collapsing to page
- Docs: trade-pro theme port spec (R3) and implementation plan

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

app/worker_health.py

@@ -0,0 +1,18 @@
+"""Docker worker liveness probe: no localhost Web dependency."""
+import os
+import time
+from pathlib import Path
+from . import db
+
+def healthy(path=None, max_age=None):
+    file=Path(path) if path is not None else db.DATA/'worker-heartbeat'
+    limit=float(max_age if max_age is not None else os.getenv('SITEFORGE_WORKER_HEALTH_MAX_AGE','45'))
+    if limit <= 0:return False
+    try:
+        age=time.time()-file.stat().st_mtime
+        return -5 <= age < limit
+    except OSError:
+        return False
+
+if __name__=='__main__':
+    raise SystemExit(0 if healthy() else 1)