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>

.dockerignore

@@ -0,0 +1,19 @@
+.git/
+.idea/
+.venv/
+__pycache__/
+*.py[cod]
+*.pyo
+*.pyd
+.pytest_cache/
+.coverage
+htmlcov/
+staticfiles/
+db.sqlite3
+artifacts_store/
+django-runserver.log
+django-runserver.err.log
+.env
+.env.*
+deploy/.env
+deploy/data/