Initial commit — DRB server stack

Includes c2-core (FastAPI/MQTT/Firestore), discord-bot (slash commands),
frontend (Next.js admin UI), and mosquitto config.

drb-c2-core/app/routers/systems.py

@@ -0,0 +1,44 @@
+import uuid
+from fastapi import APIRouter, HTTPException
+from app.models import SystemCreate, SystemRecord
+from app.internal import firestore as fstore
+
+router = APIRouter(prefix="/systems", tags=["systems"])
+
+
+@router.get("")
+async def list_systems():
+    return await fstore.collection_list("systems")
+
+
+@router.get("/{system_id}")
+async def get_system(system_id: str):
+    system = await fstore.doc_get("systems", system_id)
+    if not system:
+        raise HTTPException(404, f"System '{system_id}' not found.")
+    return system
+
+
+@router.post("", status_code=201)
+async def create_system(body: SystemCreate):
+    system_id = str(uuid.uuid4())
+    doc = SystemRecord(system_id=system_id, **body.model_dump())
+    await fstore.doc_set("systems", system_id, doc.model_dump(), merge=False)
+    return doc
+
+
+@router.put("/{system_id}")
+async def update_system(system_id: str, body: SystemCreate):
+    existing = await fstore.doc_get("systems", system_id)
+    if not existing:
+        raise HTTPException(404, f"System '{system_id}' not found.")
+    await fstore.doc_update("systems", system_id, body.model_dump())
+    return {**existing, **body.model_dump()}
+
+
+@router.delete("/{system_id}", status_code=204)
+async def delete_system(system_id: str):
+    existing = await fstore.doc_get("systems", system_id)
+    if not existing:
+        raise HTTPException(404, f"System '{system_id}' not found.")
+    await fstore.doc_delete("systems", system_id)