feat(crate): scaffold the ADR-013 §4 feature graph and module skeleton
- Declare the decided feature graph in the manifest: sqlite default-on
(rusqlite 0.40 bundled), postgres (tokio-postgres 0.7 +
deadpool-postgres 0.14), mem (dependency-free), pg-lo pulling the
shared pg driver cluster only (no postgres implication, ADR-010 §1),
ops (alkcall 0.8.1, default-off); local ungated
- Replace the placeholder crate body with the module skeleton: lib.rs
re-export shape, ungated stubs (hashing, error, backend, facade,
dispatch, gc, local), engine stubs behind #[cfg(feature)]
(mem, pg_lo, postgres, sqlite, ops); stubs are doc-comment-only so
wave-1 tasks own the module bodies
Verification: cargo test green (default); cargo check --all-features
resolves the full graph; cargo check --no-default-features --features
pg-lo resolves with rusqlite provably absent (tree-inverted match) —
the ADR-010 §1 no-implication rule; clippy --all-targets -D warnings
and cargo fmt --check clean.
Task: tasks/scaffold-crate-features.md (wave 1)
glm-5.3-flash
24d1c68343