Add Reddit monitoring bot — backend, frontend, and Docker config

Python/FastAPI backend with PostgreSQL for collecting Reddit data via
public .json endpoints. React/Vite dashboard for analytics. Docker Compose
setup with API and worker services connecting to shared PostgreSQL.

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

backend/routers/digests.py

@@ -0,0 +1,54 @@
+from fastapi import APIRouter, Depends, HTTPException, Query
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from backend.database import get_db
+from backend.models.daily_digest import DailyDigest
+from backend.models.subreddit import MonitoredSubreddit
+
+router = APIRouter(prefix="/digests", tags=["digests"])
+
+
+@router.get("")
+async def list_digests(
+    subreddit_id: int | None = None,
+    page: int = Query(1, ge=1),
+    per_page: int = Query(25, ge=1, le=100),
+    db: AsyncSession = Depends(get_db),
+):
+    stmt = (
+        select(DailyDigest, MonitoredSubreddit.name)
+        .join(MonitoredSubreddit)
+        .order_by(DailyDigest.digest_date.desc())
+    )
+    if subreddit_id:
+        stmt = stmt.where(DailyDigest.subreddit_id == subreddit_id)
+
+    stmt = stmt.offset((page - 1) * per_page).limit(per_page)
+    result = await db.execute(stmt)
+
+    digests = []
+    for digest, sub_name in result.all():
+        data = {c.name: getattr(digest, c.name) for c in digest.__table__.columns}
+        data["subreddit_name"] = sub_name
+        digests.append(data)
+
+    return {"data": digests, "page": page, "per_page": per_page}
+
+
+@router.get("/{digest_id}")
+async def get_digest(digest_id: int, db: AsyncSession = Depends(get_db)):
+    stmt = (
+        select(DailyDigest, MonitoredSubreddit.name)
+        .join(MonitoredSubreddit)
+        .where(DailyDigest.id == digest_id)
+    )
+    result = await db.execute(stmt)
+    row = result.first()
+    if not row:
+        raise HTTPException(status_code=404, detail="Digest not found")
+
+    digest, sub_name = row
+    data = {c.name: getattr(digest, c.name) for c in digest.__table__.columns}
+    data["subreddit_name"] = sub_name
+    return data