iii 0.21.5

What's Changed

• fix(iii-worker): make iii worker list/status reflect engine truth (MOT-3931) by @andersonleal in #1949
• feat(engine): engine::functions::list accepts a workers filter by @ytallo in #1952
• chore(docs): re-render stale skill artifacts for iii-skill-render 0.4.28 by @anthonyiscoding in #1931
• fix(queue): apply per-subscriber retry tuning in the builtin adapter by @ytallo in #1957
• Docs/queue improvement by @anthonyiscoding in #1951
• fix code sample drift from current SDK by @anthonyiscoding in #1953
• (MOT-3944) feat(engine): route enqueue actions through queue worker by @ytallo in #1950
• feat(observability): implement live span start processor for real-time tracing updates by @sergiofilhowz in #1954

Full Changelog: iii/v0.21.4...iii/v0.21.5