init: scaffold psyc — defensive CTI routing & evidence-sealing platform

Stage-1 vertical slice: Pydantic Case model, SQLAlchemy Core persistence,
URLhaus Scoutline fetcher, FastAPI/Jinja cockpit (cases list + detail),
flat Typer CLI, Result[T, E] type module, structlog config.
Architecture in docs/dossier.md; 12-fold style guide in docs/style.md.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,23 @@
+# venv / build
+.venv/
+venv/
+__pycache__/
+*.egg-info/
+build/
+dist/
+*.pyc
+
+# data / runtime
+data/*.db
+data/*.db-journal
+data/sealed/
+data/keys/
+
+# env
+.env
+.env.local
+
+# editors
+.vscode/
+.idea/
+*.swp