Memory analyzer renders blank RecentAction labels

Problem

memory/analyzer.ts formats recent operations using payload.kind and payload.description, but persisted Canvas events use typed RecentAction values in payload.action. Valid events therefore render as blank - event: entries. Phase 3 intentionally preserved this existing output while changing the storage source.

Acceptance criteria

• Format the typed payload.action value.
• Include bounded useful details without exposing unbounded payloads.
• Update analyzer regression tests or snapshots.
• Preserve the prompt size cap and event order.

Start with memory/analyzer.ts and inspect how persisted Canvas events are formatted, then locate the analyzer regression tests or snapshots. Update the output to use the typed payload.action value with bounded details, while preserving the prompt size cap and event order; the regression tests or snapshots should confirm the corrected labels.