Initial commit: LlamaLink Go rewrite

Complete rewrite from Python/FastAPI to Go/Gin:
- Go backend: auth (API keys + bcrypt), llama.cpp subprocess manager,
  hot-swap multi-model, rate limiting, quota system, webhooks
- Vue 3 SPA admin panel (src/) with Tailwind CSS
- Deployment: Docker multi-stage, docker-compose, nginx, systemd
- GORM/SQLite models: ApiKey, Model, UsageLog, Quota, Webhook
- REST API: /api/v1/admin/* (keys, models, chat, usage, health)
- Embedded frontend via go:embed (build output at web/dist/)

Removed legacy Python artifacts (app/, tests/, pyproject.toml, etc.)

deploy/Caddyfile

@@ -0,0 +1,60 @@
+# LlamaLink Caddyfile
+# Auto HTTPS via Let's Encrypt
+
+llamalink.local {
+    reverse_proxy llamalink:8000
+
+    log {
+        output file /var/log/caddy/llamalink.log
+    }
+
+    handle /health {
+        reverse_proxy llamalink:8000
+    }
+
+    handle /ready {
+        reverse_proxy llamalink:8000
+    }
+
+    handle /v1/chat/completions {
+        reverse_proxy llamalink:8000 {
+            flush_interval -1
+        }
+    }
+
+    handle {
+        reverse_proxy llamalink:8000
+    }
+}
+
+# Production with TLS
+# Replace with your domain
+llamalink.example.com {
+    reverse_proxy llamalink:8000
+
+    tls {
+        protocols tls1.2 tls1.3
+    }
+
+    log {
+        output file /var/log/caddy/llamalink.log
+    }
+
+    handle /health {
+        reverse_proxy llamalink:8000
+    }
+
+    handle /ready {
+        reverse_proxy llamalink:8000
+    }
+
+    handle /v1/chat/completions {
+        reverse_proxy llamalink:8000 {
+            flush_interval -1
+        }
+    }
+
+    handle {
+        reverse_proxy llamalink:8000
+    }
+}