Adds gather_usage() (stubbed, returns available:false), known_hostnames()
with graceful degradation when terraform/ansible-inventory are absent,
_run_json() helper, and main() that parses reference.md and emits JSON.
Three new TDD tests (12 total, all passing). Script exits 0 with valid
JSON even when no cluster is provisioned.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Implements the parse_table() function and pytest test harness for the
capacity-scan script. Tests cover header matching and graceful empty
return when the required header is absent.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
