Remove UHPPOTE/ZKTeco; Dingtian is the only access driver

Neither UHPPOTE nor ZKTeco is used — the Dingtian relay controller was chosen
and verified. Remove their code and re-scope the wiki.

Code:
- delete access-uhppote.ts, uhppoted.d.ts, access.ts (zkteco/esp32-relay stubs),
  and the three uhppote-*.mjs hardware test scripts.
- remove the `uhppoted` npm dependency from @parking/devices and @parking/server.
- unregister uhppote/zkteco/esp32-relay from the driver registry; drop their
  exports. Catalog access drivers = dingtian only. Build green (5/5).
- refresh now-stale example comments (registry/interfaces/setup/api) to use
  current examples; keep the two "UHPPOTE blocker" references that explain why
  the precondition capability exists.

Wiki (kept pages, re-scoped):
- uhppote-controller, zkteco-controller -> rejected/historical with callouts;
  uhppote-vs-esp32 -> historical (detection-vs-prevention lens still useful).
- re-point all "current device" framing (standing-decisions, bom, overview,
  open-questions, device-registry, device-discovery, index) to dingtian-relay.
- transferable concepts (network-isolation, event-log-ingestion, barrier-not-a-
  door, threat-model) untouched. Raw source immutable. Links lint clean.

pnpm-lock.yaml

@@ -50,9 +50,6 @@ importers:
       fastify-plugin:
         specifier: 6.0.0
         version: 6.0.0
-      uhppoted:
-        specifier: 0.9.0
-        version: 0.9.0
     devDependencies:
       '@types/bcrypt':
         specifier: 6.0.0
@@ -122,9 +119,6 @@ importers:
       '@parking/shared':
         specifier: workspace:*
         version: link:../shared
-      uhppoted:
-        specifier: 0.9.0
-        version: 0.9.0
     devDependencies:
       '@types/node':
         specifier: 25.9.3
@@ -1262,9 +1256,6 @@ packages:
   once@1.4.0:
     resolution: {integrity: sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w==}
 
-  os@0.1.2:
-    resolution: {integrity: sha512-ZoXJkvAnljwvc56MbvhtKVWmSkzV712k42Is2mA0+0KTSRakq5XXuXpjZjgAt9ctzl51ojhQWakQQpmOvXWfjQ==}
-
   path-scurry@2.0.2:
     resolution: {integrity: sha512-3O/iVVsJAPsOnpwWIeD+d6z/7PmqApyQePUtCndjatj/9I5LylHvt5qluFaBT3I5h3r1ejfR056c+FCv+NnNXg==}
     engines: {node: 18 || 20 || >=22}
@@ -1467,10 +1458,6 @@ packages:
     engines: {node: '>=14.17'}
     hasBin: true
 
-  uhppoted@0.9.0:
-    resolution: {integrity: sha512-7VDPNg4x31TETgMD3xp9NwVr+NvmZJ6CO8gTpyuRrdHu/UBGXw9/9kq8yiB0vR4opaUQPdvR8Gj373Ac/QWPwQ==}
-    engines: {node: '>=14.18.3'}
-
   undici-types@7.24.6:
     resolution: {integrity: sha512-WRNW+sJgj5OBN4/0JpHFqtqzhpbnV0GuB+OozA9gCL7a993SmU+1JBZCzLNxYsbMfIeDL+lTsphD5jN5N+n0zg==}
 
@@ -2357,8 +2344,6 @@ snapshots:
     dependencies:
       wrappy: 1.0.2
 
-  os@0.1.2: {}
-
   path-scurry@2.0.2:
     dependencies:
       lru-cache: 11.5.1
@@ -2586,10 +2571,6 @@ snapshots:
 
   typescript@6.0.3: {}
 
-  uhppoted@0.9.0:
-    dependencies:
-      os: 0.1.2
-
   undici-types@7.24.6: {}
 
   util-deprecate@1.0.2: {}