Statement loader web app with Docker image and Gitea Actions build

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,12 @@
+# private financial data - never commit
+*.pdf
+*.csv
+*.xlsx
+backups/
+data/
+Statement_Coverage.txt
+# local tooling
+.venv/
+__pycache__/
+.DS_Store
+loader_rules.json