Метрики /metrics для Next.js и ws-proxy (центральный Prometheus)

proxy-ws (Rust/axum) — тот же паттерн, что api.rs в netrunner-backend:
PrometheusBuilder + middleware, считающий http_requests_total/
http_request_duration_seconds по методу/пути/статусу.

Next.js — app/api/metrics/route.ts на prom-client (явный
runtime="nodejs", т.к. Edge Runtime не тянет perf_hooks/process.*),
отдаёт default-метрики процесса (CPU/память/event loop lag).

Оба порта (3000/3001) перестают быть 127.0.0.1-only — их должен
скрейпить центральный Prometheus на VPS с данными, обязательно
зафайрволить там на его IP (см. комментарии в docker-compose.yml).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

pnpm-lock.yaml

@@ -37,13 +37,16 @@ importers:
         version: 1.0.0
       next:
         specifier: 16.2.4
-        version: 16.2.4(@babel/core@7.29.0)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
+        version: 16.2.4(@babel/core@7.29.0)(@opentelemetry/api@1.9.1)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
       next-themes:
         specifier: ^0.4.6
         version: 0.4.6(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
       pocketbase:
         specifier: ^0.26.8
         version: 0.26.8
+      prom-client:
+        specifier: ^15.1.3
+        version: 15.1.3
       radix-ui:
         specifier: ^1.4.3
         version: 1.4.3(@types/react-dom@19.2.3(@types/react@19.2.14))(@types/react@19.2.14)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
@@ -648,6 +651,10 @@ packages:
   '@open-draft/until@2.1.0':
     resolution: {integrity: sha512-U69T3ItWHvLwGg5eJ0n3I62nWuE6ilHlmz7zM0npLBRvPRd7e6NYmg54vvRtP5mZG7kZqZCFVdsTWo7BPtBujg==}
 
+  '@opentelemetry/api@1.9.1':
+    resolution: {integrity: sha512-gLyJlPHPZYdAk1JENA9LeHejZe1Ti77/pTeFm/nMXmQH/HFZlcS/O2XJB+L8fkbrNSqhdtlvjBVjxwUYanNH5Q==}
+    engines: {node: '>=8.0.0'}
+
   '@radix-ui/number@1.1.1':
     resolution: {integrity: sha512-MkKCwxlXTgz6CFoJx3pCwn07GKp36+aZyu/u2Ln2VrA5DcdyCZkASEDBTd8x5whTQQL5CiYf4prXKLcgQdv29g==}
 
@@ -1765,6 +1772,9 @@ packages:
     engines: {node: '>=6.0.0'}
     hasBin: true
 
+  bintrees@1.0.2:
+    resolution: {integrity: sha512-VOMgTMwjAaUG580SXn3LacVgjurrbMme7ZZNYGSSV7mmtY6QQRh0Eg3pwIcntQ77DErK1L0NxkbetjcoXzVwKw==}
+
   body-parser@2.2.2:
     resolution: {integrity: sha512-oP5VkATKlNwcgvxi0vM0p/D3n2C3EReYVX+DNYs5TjZFn/oQt2j+4sVJtSMr18pdRr8wjTcBl6LoV+FUwzPmNA==}
     engines: {node: '>=18'}
@@ -3199,6 +3209,10 @@ packages:
     resolution: {integrity: sha512-gjVS5hOP+M3wMm5nmNOucbIrqudzs9v/57bWRHQWLYklXqoXKrVfYW2W9+glfGsqtPgpiz5WwyEEB+ksXIx3gQ==}
     engines: {node: '>=18'}
 
+  prom-client@15.1.3:
+    resolution: {integrity: sha512-6ZiOBfCywsD4k1BN9IX0uZhF+tJkV8q8llP64G5Hajs4JOeVLPCwpPVcpXy3BwYiUGgyJzsJJQeOIv7+hDSq8g==}
+    engines: {node: ^16 || ^18 || >=20}
+
   prompts@2.4.2:
     resolution: {integrity: sha512-NxNv/kLguCA7p3jE8oL2aEBsrJWgAakBpgmgK6lpPWV+WuOmY6r2/zbAVnP+T8bQlA0nzHXSJSJW0Hq7ylaD2Q==}
     engines: {node: '>= 6'}
@@ -3558,6 +3572,9 @@ packages:
     resolution: {integrity: sha512-1MOpMXuhGzGL5TTCZFItxCc0AARf1EZFQkGqMm7ERKj8+Hgr5oLvJOVFcC+lRmR8hCe2S3jC4T5D7Vg/d7/fhA==}
     engines: {node: '>=6'}
 
+  tdigest@0.1.2:
+    resolution: {integrity: sha512-+G0LLgjjo9BZX2MfdvPfH+MKLCrxlXSYec5DaPYP1fe6Iyhf0/fSmJ0bFiZ1F8BT6cGXl2LpltQptzjXKWEkKA==}
+
   tiny-invariant@1.3.3:
     resolution: {integrity: sha512-+FbBPE1o9QAYvviau/qC5SE3caw21q3xkvWKBtja5vgqOWIHHJ3ioaq1VPfn/Szqctz2bU/oYeKd9/z5BL+PVg==}
 
@@ -4356,6 +4373,8 @@ snapshots:
 
   '@open-draft/until@2.1.0': {}
 
+  '@opentelemetry/api@1.9.1': {}
+
   '@radix-ui/number@1.1.1': {}
 
   '@radix-ui/primitive@1.1.3': {}
@@ -5507,6 +5526,8 @@ snapshots:
 
   baseline-browser-mapping@2.10.19: {}
 
+  bintrees@1.0.2: {}
+
   body-parser@2.2.2:
     dependencies:
       bytes: 3.1.2
@@ -6805,7 +6826,7 @@ snapshots:
       react: 19.2.4
       react-dom: 19.2.4(react@19.2.4)
 
-  next@16.2.4(@babel/core@7.29.0)(react-dom@19.2.4(react@19.2.4))(react@19.2.4):
+  next@16.2.4(@babel/core@7.29.0)(@opentelemetry/api@1.9.1)(react-dom@19.2.4(react@19.2.4))(react@19.2.4):
     dependencies:
       '@next/env': 16.2.4
       '@swc/helpers': 0.5.15
@@ -6824,6 +6845,7 @@ snapshots:
       '@next/swc-linux-x64-musl': 16.2.4
       '@next/swc-win32-arm64-msvc': 16.2.4
       '@next/swc-win32-x64-msvc': 16.2.4
+      '@opentelemetry/api': 1.9.1
       sharp: 0.34.5
     transitivePeerDependencies:
       - '@babel/core'
@@ -7027,6 +7049,11 @@ snapshots:
     dependencies:
       parse-ms: 4.0.0
 
+  prom-client@15.1.3:
+    dependencies:
+      '@opentelemetry/api': 1.9.1
+      tdigest: 0.1.2
+
   prompts@2.4.2:
     dependencies:
       kleur: 3.0.3
@@ -7548,6 +7575,10 @@ snapshots:
 
   tapable@2.3.2: {}
 
+  tdigest@0.1.2:
+    dependencies:
+      bintrees: 1.0.2
+
   tiny-invariant@1.3.3: {}
 
   tinyglobby@0.2.16: