Every site's HR directory and USB check-in/out databases may use a different
schema, so document exactly what each plugin queries and how to adapt.
- plugins/employees/README.md: required employees table columns (SSO,
First_Name, Last_Name, Team, Role, Picture), the queries run, photo handling,
and a CREATE VIEW recipe to map a different site schema without code changes.
- plugins/usb/README.md: cmmc_usb devices / checkinoutlog / users columns,
read-write ops, the employee-directory dependency, and a view recipe.
- USB plugin gains get_config_schema() (cmmc_usb_db_host/name/user + password);
cmmc_usb_connection reads host/name/user settings-first (env fallback), the
password stays env-only - matching the employees plugin.
- Config-field help points at the READMEs.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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