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>

deploy/Caddyfile

@@ -0,0 +1,9 @@
+{$SITEFORGE_DOMAIN} {
+    encode zstd gzip
+    reverse_proxy siteforge:8787
+    header {
+        Strict-Transport-Security "max-age=31536000"
+        X-Content-Type-Options "nosniff"
+        Referrer-Policy "strict-origin-when-cross-origin"
+    }
+}