v17.0.0

What's Changed

• fix(release): publish-all.sh aborts on first publish failure by @fr0ster in #153
• ci: drop Node 20 — matrix on Node 22 + 24, bump actions to v5 by @fr0ster in #154
• fix(coordinator): #155 answer non-decomposable prompts instead of (no response) by @fr0ster in #156
• feat(coordinator): epic anchor + slice 1 — batch DAG coordinator (opt-in, alongside linear) by @fr0ster in #158
• feat(coordinator): slice 2 — plan reviewer gate + roles unified on ISubAgent by @fr0ster in #160
• feat(coordinator)!: slice 3 — replan-by-leaf-signal + remove nested dispatch by @fr0ster in #161
• feat(coordinator)!: slice 4 — reviewer-driven recovery + coordinator loop, state-oracle, clarify (4a+4b) by @fr0ster in #162
• feat(session)!: session-scoped infrastructure (cookie identity, per-session graph factory, token-usage rollup) by @fr0ster in #163
• spec(18.0): recursive Stepper architecture — design + brainstorm trace (review) by @fr0ster in #165

Full Changelog: v16.2.0...v17.0.0