Add Flask web UI, Docker Compose, core engine + tests

- physcom core: CLI, 5-pass pipeline, SQLite repo, 37 tests
- physcom_web: Flask app with HTMX for entity/domain/pipeline/results CRUD
- Docker Compose: web + cli services sharing a named volume for the DB
- Clean up local settings to use wildcard permissions

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

.gitignore

@@ -174,3 +174,6 @@ cython_debug/
 # PyPI configuration file
 .pypirc
 
+# Project data
+data/
+