The pure generation half of `seed` — no command wiring yet:
- src/seed/: ColumnSpec + Generator model and a seeded StdRng; the
type-gated name-heuristic catalogue (D7) with documented
false-positive guards; table-context name disambiguation (D11);
identifier (D10) and enum-ish (D12) detection; per-type + bounded-date
generators (D8); the hand-rolled product generator (D9); and PickFrom
for IN-CHECK / enum lists.
- Adds the `fake` crate (v5, default features). Verified: single rand
0.10.1 (no duplication), determinism via one seeded StdRng driving
both fake and the hand-rolled generators, security-clean across
osv/grype/trivy.
- ADR-0048 D3 updated to record the dependency verification.
32 Tier-1 tests (exact-value via fixed --seed); 1673 lib tests pass,
clippy all-targets clean.