fix(gtd): gtd.complete treats active as terminal state

[ohdearquant]

Bug

gtd.complete(id=<task>) returns error: "task is in terminal state 'active'; no further transitions allowed"

But gtd.transition(id=<task>, status="done") works fine from active state.

Expected

gtd.complete should transition active→done (that's its entire purpose).

Workaround

Use gtd.transition(id=X, status="done") instead. Documented in all agent definitions.

Found

Dogfood sweep 2026-05-27.

[ohdearquant]

Resolved in PR #600 (v0.2.3). context_entity_id on assign + hardened complete() error path.