ogar-emitter: add write_adapter — the CRUD write twin of emit_projection_adapters

[AdaWorldAPI]

What

The read arm (emit_projection_adapters, projection_adapter.rs) generates real impl From<Row> for Domain read projections. There was no Core write equivalent: the only write-side emitter here, emit_do_adapters, is deliberately signature-only (unimplemented!() bodies — thinking lives upstream). A CRUD statement is a mechanical persistence leaf, exactly the regular, falsifiable body the read arm already proves is emittable.

This promotes the write emitter (prototyped + proven in the medcare-rs consumer across MedCare PRs #233/#234/#235) into the Core, so consumers stop carrying their own copy — the Core-first home, matching the read arm.

write_adapter.rs

• WriteValue / WriteColumn + typed constructors: bind / lit / bind_expr / bind_cast / bind_opt_cast / bind_clone / bind_bool_flag — the write inverse of the read arm's FieldSource variants.
• InsertClass + emit_insert_adapters — INSERT … VALUES … last_insert_id.
• UpdateClass + SoftDeleteClass + emit_update_adapters — UPDATE … SET … WHERE id = ? (with an optional COALESCE(<col>,0)=0 soft-delete filter) and the SET <flag>=1, <date>=NOW() tombstone. Both DbResult<()>.

Corpus-agnostic (only typed recipes in; no domain data). Deterministic (recipe order preserved) so a consumer byte-guards its committed generated file against a fresh emit. Generic vs the medcare prototype: the soft-delete columns and the not-deleted filter column are parameterized (flag_column / date_column / not_deleted_column), not hardcoded to pf_*.

Verified

• 6 self-contained tests over a synthetic t_event recipe (SQL/bind consistency, id-bind-last + soft-delete filter, filter toggle, tombstone shape, multi-line doc, determinism).
• cargo test -p ogar-emitter → 45/45.
• cargo clippy -p ogar-emitter --all-targets -- -D warnings → exit 0.
• do_adapter.rs left untouched — it carries a pre-existing rustfmt-version-skew diff unrelated to this change; OGAR CI gates on cargo test, not fmt.

Follow-up

medcare-rs refactors its insert_codegen to consume these types instead of its local copy (the consumer PR, once this lands on OGAR main).

🤖 Generated with Claude Code

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