v3.13.1

Changed

• Docs caught up with v3.13.0 across both languages. how-it-works /
  como-funciona gain a "multi-writer safety + evolutive memory" section with
  two new diagrams (ifMatch sequence; the learning loop), the retrieval-stack
  and memory-report diagrams now show the pin_failures/usage levers,
  recall telemetry and reflect: true; sync guides document the 3.13
  audit-trail commits and OBSIDIAN_MEMORY_AGENT; the AGENTS stack catalog
  and README --full callouts mention the new capabilities (ADR-0037/0038).