Ports all remaining LEM pipeline commands from pkg/lem into core ml,
eliminating the standalone LEM CLI dependency. Each command is split
into reusable business logic (pkg/ml/) and a thin cobra wrapper
(internal/cmd/ml/).
New commands: query, inventory, metrics, ingest, normalize, seed-influx,
consolidate, import-all, approve, publish, coverage.
Adds Path(), Exec(), QueryRowScan() convenience methods to DB type.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
