docs: generate gitea wiki pages + publish script

add wiki/ markdown pages (Home, Sidebar, architecture, transport, developer, usage)

add scripts/publish_gitea_wiki.sh to sync wiki repo

fix: serialize aggregate env-setting tests to avoid parallel env var races

wiki/API-Examples.md

@@ -0,0 +1,28 @@
+# API Examples
+
+## Projection Query via Gateway (HTTP → gRPC)
+```bash
+curl -sS -X POST \
+  -H "x-tenant-id: tenant-a" \
+  -H "x-correlation-id: demo" \
+  -H "traceparent: 00-00000000000000000000000000000001-0000000000000001-01" \
+  http://localhost:8080/v1/query/User \
+  -d '{"uqf":"{\"eq\":{\"id\":\"u1\"}}"}'
+```
+
+## Projection Query via gRPC (direct, internal)
+```bash
+grpcurl -d '{"tenant_id":"tenant-a","view_type":"User","uqf":"{}"}' \
+  -H 'x-tenant-id: tenant-a' \
+  -H 'x-correlation-id: demo' \
+  -H 'traceparent: 00-00000000000000000000000000000001-0000000000000001-01' \
+  -plaintext localhost:9090 projection.gateway.v1.QueryService/ExecuteQuery
+```
+
+## Runner Admin via Gateway (HTTP → gRPC)
+```bash
+curl -sS -X POST \
+  -H "x-tenant-id: tenant-a" \
+  -H "authorization: Bearer <token>" \
+  http://localhost:8080/admin/runner/drain?wait_ms=0
+```