Rename package from baflakehouse to bankfraud

- DESCRIPTION: Package name and URL updated to /bank-fraud
- R/baflakehouse-package.R → R/bankfraud-package.R
- _pkgdown.yml: url and reference alias updated
- deploy.yaml: TARGET_DIR updated to /var/www/docs/bank-fraud/
- deploy/baflakehouse.caddy: deleted (stale, superseded by rsync workflow)
- tests and README updated

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

_pkgdown.yml

@@ -1,4 +1,4 @@
-url: https://docs.robwiederstein.org/baflakehouse
+url: https://docs.robwiederstein.org/bank-fraud
 
 template:
   bootstrap: 5
@@ -17,7 +17,7 @@ reference:
   - title: "Data Ingestion & Lakehouse Setup"
     desc: "Functions for moving raw CSV data into the MinIO Lakehouse as partitioned Parquet."
     contents:
-      - baflakehouse-package
+      - bankfraud-package
       - convert_to_parquet
       - connect_baf
       - clean_baf_base