v0.20.0

What's Changed

• fix(dx): review findings are fixed in the round they appear, never deferred by @mhenrixon in #557
• feat(workflows): Pgbus::Workflow core — steps, waits, flow control, policies, idempotency, audit trail, housekeeping, metrics by @mhenrixon in #555
• feat(workflows): waiting steps — fan_out over a batch, signals, wait timeouts by @mhenrixon in #558
• chore(claude): move the workflow onto the shared flow plugin by @mhenrixon in #559
• feat(dashboard): Workflows pages — list + filters, needs attention, timeline, audit trail, operator actions, MCP read tools by @mhenrixon in #560
• chore(labels): name the flow plugin's /flow:plan and /flow:lfg by @mhenrixon in #561
• feat(dashboard): workflow insights — per-class pipeline, step performance, funnels, MCP stats by @mhenrixon in #562
• feat(mcp): workflow write tools, opt-in — resume, cancel, skip, resume at, run now, signal by @mhenrixon in #563

Full Changelog: v0.19.4...v0.20.0