feat: add GET /api/v1/stats endpoint with technique and creator counts

backend/main.py

@@ -12,7 +12,7 @@ from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 
 from config import get_settings
-from routers import creators, health, ingest, pipeline, reports, search, techniques, topics, videos
+from routers import creators, health, ingest, pipeline, reports, search, stats, techniques, topics, videos
 
 
 def _setup_logging() -> None:
@@ -83,6 +83,7 @@ app.include_router(ingest.router, prefix="/api/v1")
 app.include_router(pipeline.router, prefix="/api/v1")
 app.include_router(reports.router, prefix="/api/v1")
 app.include_router(search.router, prefix="/api/v1")
+app.include_router(stats.router, prefix="/api/v1")
 app.include_router(techniques.router, prefix="/api/v1")
 app.include_router(topics.router, prefix="/api/v1")
 app.include_router(videos.router, prefix="/api/v1")

backend/routers/stats.py

@@ -0,0 +1,29 @@
+"""Public stats endpoints for Chrysopedia."""
+
+import logging
+
+from fastapi import APIRouter, Depends
+from sqlalchemy import func, select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from database import get_session
+from models import Creator, TechniquePage
+
+logger = logging.getLogger("chrysopedia.stats")
+
+router = APIRouter(tags=["stats"])
+
+
+@router.get("/stats")
+async def get_stats(db: AsyncSession = Depends(get_session)) -> dict:
+    """Return aggregate counts for the knowledge base."""
+    technique_count = await db.scalar(
+        select(func.count()).select_from(TechniquePage)
+    )
+    creator_count = await db.scalar(
+        select(func.count()).select_from(Creator)
+    )
+    return {
+        "technique_count": technique_count or 0,
+        "creator_count": creator_count or 0,
+    }