Initialize repository snapshot

.gitignore

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+target/
+__pycache__/
+*.pyc
+.venv/
+.DS_Store
+*.egg-info/
+
+# Local-first SQLite ledger and seal bundles
+.state/
+*.sqlite
+*.sqlite-wal
+*.sqlite-shm
+
+# Runtime logs and receipts
+logs/
+receipts/
+
+# Guardian/automation/offsec/treasury ROOT state files
+ROOT.*.txt
+
+# Generic logs
+*.log
+
+# Generated verifier reports
+verification_report.json
+verification_report_*.json