docs(plugins): fix markdown formatting for CI

docs/plugins/execution-spine-contract.md

@@ -9,12 +9,15 @@ title: "Plugin Execution Spine Contract"
 # Plugin Execution Spine Contract (v1)
 
 ## Flow
+
 `propose -> approve(if risky) -> execute -> verify`
 
 ## ACK-first
+
 Actionable requests SHOULD emit immediate ACK before long-running work.
 
 ## Goals
+
 - Lean core, stronger plugins
 - Predictable safety behavior
 - Auditable execution trail

docs/plugins/handoff-packet-schema-v1.md

@@ -9,9 +9,11 @@ title: "Resumable Handoff Packet Schema (v1)"
 # Resumable Handoff Packet (v1)
 
 ## Purpose
+
 Allow model/agent/plugin swap mid-run without continuity loss.
 
 ## Core fields
+
 - `runId`
 - `goalId`
 - `currentStep`

docs/plugins/plugin-health-schema.md

@@ -9,11 +9,13 @@ title: "Plugin Health Schema"
 # Plugin Health Schema (v1)
 
 ## Status enum
+
 - `healthy`
 - `degraded`
 - `blocked`
 
 ## Required fields
+
 - `status`
 - `lastError` (nullable)
 - `nextAction` (nullable)

docs/plugins/retry-deadletter-policy.md

@@ -11,9 +11,11 @@ title: "Retry + Dead-letter Policy"
 Related: [Core retry policy](/concepts/retry)
 
 ## Retry
+
 - Bounded retries only (no infinite loops)
 - Explicit retry count + backoff
 
 ## Dead-letter
+
 - Failed items after max retries move to dead-letter queue
 - Must include failure reason + next operator action