fathomdb-cli 0.8.9

FathomDB CLI — operator and diagnostics binary (fathomdb doctor, fathomdb export, ...).
Documentation

Operator CLI parser + verb runtime for fathomdb.

Surface owned by dev/interfaces/cli.md. Phase 10a wires the parser scaffold to real engine seam calls: doctor check-integrity, doctor safe-export, doctor trace, recover --rebuild-projections, recover --rebuild-vec0, and recover --excise-source invoke the corresponding [fathomdb::Engine] methods and serialize the typed report under the per-verb JSON discriminator.