Initial commit: breakpilot-core - Shared Infrastructure

Docker Compose with 24+ services:
- PostgreSQL (PostGIS), Valkey, MinIO, Qdrant
- Vault (PKI/TLS), Nginx (Reverse Proxy)
- Backend Core API, Consent Service, Billing Service
- RAG Service, Embedding Service
- Gitea, Woodpecker CI/CD
- Night Scheduler, Health Aggregator
- Jitsi (Web/XMPP/JVB/Jicofo), Mailpit

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend-core/system_api.py

@@ -0,0 +1,66 @@
+"""
+System API endpoints for health checks and system information.
+
+Provides:
+- /health - Basic health check
+- /api/v1/system/local-ip - Local network IP for QR-code mobile upload
+"""
+
+import os
+import socket
+from fastapi import APIRouter
+
+router = APIRouter(tags=["System"])
+
+
+@router.get("/health")
+async def health_check():
+    """
+    Basic health check endpoint.
+
+    Returns healthy status and service name.
+    """
+    return {
+        "status": "healthy",
+        "service": "breakpilot-backend-core"
+    }
+
+
+@router.get("/api/v1/system/local-ip")
+async def get_local_ip():
+    """
+    Return the local network IP address.
+
+    Used for QR-code generation for mobile PDF upload.
+    Mobile devices can't reach localhost, so we need the actual network IP.
+
+    Priority:
+    1. LOCAL_NETWORK_IP environment variable (explicit configuration)
+    2. Auto-detection via socket connection
+    3. Fallback to default 192.168.178.157
+    """
+    # Check environment variable first
+    env_ip = os.getenv("LOCAL_NETWORK_IP")
+    if env_ip:
+        return {"ip": env_ip}
+
+    # Try to auto-detect
+    try:
+        # Create a socket to an external address to determine local IP
+        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        s.settimeout(0.1)
+        # Connect to a public DNS server (doesn't actually send anything)
+        s.connect(("8.8.8.8", 80))
+        local_ip = s.getsockname()[0]
+        s.close()
+
+        # Validate it's a private IP
+        if (local_ip.startswith("192.168.") or
+            local_ip.startswith("10.") or
+            (local_ip.startswith("172.") and 16 <= int(local_ip.split('.')[1]) <= 31)):
+            return {"ip": local_ip}
+    except Exception:
+        pass
+
+    # Fallback to default
+    return {"ip": "192.168.178.157"}