Initial public commit

Daybook: a self-hosted, multi-user Django + DRF app where agents, scripts,
or people publish artifacts and each logged-in user browses their own
time-ordered, label-filterable feed.

This squashes prior local development history (kept privately on a separate
branch) into a single clean starting point for the public repository.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

deploy/docker-compose.yml

@@ -0,0 +1,19 @@
+services:
+  daybook:
+    build:
+      context: ..
+      dockerfile: deploy/Dockerfile
+    container_name: daybook
+    restart: unless-stopped
+    env_file:
+      - .env
+    ports:
+      - "8000:8000"
+    volumes:
+      - ./data:/data
+    healthcheck:
+      test: ["CMD", "curl", "-fsS", "http://127.0.0.1:8000/api/capabilities"]
+      interval: 30s
+      timeout: 5s
+      retries: 5
+      start_period: 20s