Initial import: shopdb-flask multi-site asset platform

Flask + Vue rewrite of the classic-ASP shopdb, built as a plugin
framework so sister GE Aerospace sites can adopt it. Product version
0.7.0-pre-0.8.0, plugin contract 0.11.0, 966 backend tests.

Key entry points:
- docs/INSTALL-WINDOWS-IIS.md - tested Windows + IIS install runbook
  (own-site and subpath deployment methods)
- docs/PILOT-DEPLOY.md - production pilot: stand up + import + verify
- docs/IMPORT-API.md - schema-agnostic legacy data import contract
- scripts/site_imports/wjf/ - West Jefferson reference import loader
- docs/adr/ - twelve accepted architecture decision records

shopdb/plugins/templates/frontend/frontend-api-snippet.js.tmpl

@@ -0,0 +1,35 @@
+/*
+ * ${Name} API client snippet.
+ *
+ * Paste this ${name}Api block into frontend/src/api/index.js (next to the
+ * other per-resource blocks). Then, in the generated ${Name}List, ${Name}Detail,
+ * and ${Name}Form views, delete the local ${name}Api const and import the shared
+ * one instead:
+ *
+ *   import { ${name}Api } from '../../api'
+ *
+ * The scaffolded views ship with an identical inline client so they build and
+ * run before you touch the shared api module. This file is NOT auto-merged into
+ * api/index.js on purpose; that module is hand-maintained and shared.
+ *
+ * The create/update/delete calls assume matching POST/PUT/DELETE routes exist
+ * on the backend. The scaffolded api/routes.py only ships list and get; add the
+ * write endpoints when you wire up the form.
+ */
+export const ${name}Api = {
+  list(params = {}) {
+    return api.get('/${name}', { params })
+  },
+  get(itemId) {
+    return api.get(`/${name}/${itemId}`)
+  },
+  create(data) {
+    return api.post('/${name}', data)
+  },
+  update(itemId, data) {
+    return api.put(`/${name}/${itemId}`, data)
+  },
+  remove(itemId) {
+    return api.delete(`/${name}/${itemId}`)
+  }
+}