4a5fd1b5c19a338beb8c05d2184589030c4f9368
The first exemplar (`add 1:n relationship`) showed per-node keying is too coarse for multi-form commands, so revise the mechanism to per-form. - CommandNode `hint_id: Option<&str>` -> `hint_ids: &[&str]` (mirrors usage_ids); hint_key_for_input_in_mode reuses a factored-out pick_form_key (shared digit/m:n/suffix form disambiguation with usage_key_for_input_in_mode) - wire INSERT + ADD (all four forms) with hint_ids - author the three approved exemplars: hint.cmd.insert, hint.cmd.add_relationship, hint.err.foreign_key.child_side (what/example/concept) + keys.rs registration - revise ADR-0053 D3 to per-form; record clause-concept hints as a deferred extension (issue #37); update README + plan - +5 tests; 2488 pass / 1 ignored, clippy clean
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