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>

.env.example

@@ -0,0 +1,38 @@
+# 复制为 .env 后更换密码和密钥；不要提交 .env 到版本库
+SITEFORGE_PORT=8787
+SITEFORGE_ADMIN_PASSWORD=REPLACE_WITH_STRONG_PASSWORD
+SITEFORGE_SESSION_SECRET=REPLACE_WITH_64_RANDOM_CHARACTERS
+SITEFORGE_COOKIE_SECURE=false
+
+# 只有启用 compose.public.yaml 时才需要填写，先正确设置 DNS 记录
+SITEFORGE_DOMAIN=siteforge.example.com
+
+# Enterprise-only (compose.enterprise.yaml)
+SITEFORGE_PG_USER=siteforge
+SITEFORGE_PG_PASSWORD=GENERATE_STRONG_URL_SAFE_PASSWORD
+SITEFORGE_PG_DB=siteforge
+# Must be HTTPS and trusted deployment endpoint; never set to an arbitrary user URL
+SITEFORGE_DEPLOY_STAGING_URL=
+SITEFORGE_DEPLOY_STAGING_SECRET=
+SITEFORGE_DEPLOY_PRODUCTION_URL=
+SITEFORGE_DEPLOY_PRODUCTION_SECRET=
+# Release agent is deployed as an isolated service on the receiving host
+SITEFORGE_DEPLOY_SECRET=
+
+# P1 task-queue capacity and safe outbound HTTP policy
+SITEFORGE_MAX_PENDING_JOBS=100
+SITEFORGE_MAX_PENDING_JOBS_PER_SITE=5
+SITEFORGE_OUTBOUND_PORTS=80,443
+
+# V8.5 restricted MySQL importer. Empty allowlists disable MySQL access.
+# Example values, only enable an approved server + an actual SELECT-only user.
+SITEFORGE_MYSQL_ALLOWED_HOSTS=
+SITEFORGE_MYSQL_ALLOWED_TABLES=
+# Optional CA path inside Worker. Mount certificate into Worker when using custom CA.
+SITEFORGE_MYSQL_CA_FILE=
+# Credential names should be secrets in Worker, not plaintext from the browser.
+# SITEFORGE_MYSQL_READ_USER=<use Docker secret instead>
+# SITEFORGE_MYSQL_READ_PASSWORD=<use Docker secret instead>
+# Preferred remote signing secret reference (instead of plaintext _SECRET)
+# SITEFORGE_DEPLOY_STAGING_SECRET_REF=env:SITEFORGE_DEPLOY_STAGING_SECRET
+# SITEFORGE_DEPLOY_PRODUCTION_SECRET_REF=file:siteforge_deploy_production