feat(gpu-server): complete GPU server setup with AI services, monitoring, and public access

- Set up 5 AI services on Windows GPU server (RTX 3090):
  - mana-llm (Port 3025): OpenAI-compatible LLM gateway via Ollama
  - mana-stt (Port 3020): WhisperX with word timestamps + speaker diarization
  - mana-tts (Port 3022): Kokoro (EN) + Edge TTS (DE) + Piper (local DE)
  - mana-image-gen (Port 3023): FLUX.2 klein 4B image generation
  - Ollama (Port 11434): gemma3:4b/12b, qwen2.5-coder:14b, nomic-embed-text

- Add @manacore/shared-gpu TypeScript client package with SttClient, TtsClient, ImageClient
- Add CUDA-compatible whisper_service using faster-whisper for Windows
- Configure public access via Cloudflare Tunnel (gpu-llm/stt/tts/img.mana.how)
- Add Loki log aggregator (Docker on Mac Mini) + log shipper on GPU server
- Add GPU scrape targets to Prometheus/VictoriaMetrics config
- Add Grafana Loki datasource for GPU service logs
- Add health check with auto-restart, log rotation, and log shipping
- Document complete setup: Always-On config, troubleshooting, architecture

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker/grafana/provisioning/datasources/loki.yml

@@ -0,0 +1,9 @@
+apiVersion: 1
+
+datasources:
+  - name: Loki
+    type: loki
+    access: proxy
+    url: http://loki:3100
+    isDefault: false
+    editable: true

docker/loki/local-config.yaml

@@ -0,0 +1,36 @@
+auth_enabled: false
+
+server:
+  http_listen_port: 3100
+
+common:
+  path_prefix: /loki
+  storage:
+    filesystem:
+      chunks_directory: /loki/chunks
+      rules_directory: /loki/rules
+  replication_factor: 1
+  ring:
+    kvstore:
+      store: inmemory
+
+schema_config:
+  configs:
+    - from: 2024-01-01
+      store: tsdb
+      object_store: filesystem
+      schema: v13
+      index:
+        prefix: index_
+        period: 24h
+
+limits_config:
+  retention_period: 30d
+  max_query_length: 721h
+
+compactor:
+  working_directory: /loki/compactor
+  compaction_interval: 10m
+  retention_enabled: true
+  retention_delete_delay: 2h
+  delete_request_store: filesystem