v1.24.1 — embedded default protocol resync + drift guard

Maintenance (idea embedded-default-protocol-resync, PR #47):

• Embedded default protocol resynced with the live deck. The parley init
  bootstrap template (internal/protocol/defaults/COOPERATION.md) gained the
  missing ## 12. Pipeline blocks & action stages section (byte-identical to the
  live deck) and was genericized: header Workspace/Created are now
  placeholders and both §2 tables ship empty bodies, so a freshly parley init-ed
  project no longer inherits this repo's roster/workspace.
• Anti-drift guard: a fail-closed Go test (TestEmbeddedDefaultMatchesLiveDeck)
  asserts the embedded default stays in sync with parley-deck/COOPERATION.md
  (modulo five documented, anchored project-specific zones) and that the embedded
  bootstrap shape holds — so a protocol edit landing in only one copy now breaks
  the build. Plus TestDefaultCooperationForInit for the init output.
• Synced the project deck to parley-deck-skill 1.3.1 (§12 was already present).