feat: publish FreeRTOS C FC03 card

doc/assets/a5-flow-b.puml

@@ -0,0 +1,36 @@
+@startuml
+!include card-uml-style.iuml
+scale 900 width
+hide footbox
+skinparam ParticipantPadding 16
+
+participant "main" as Main
+participant "Scheduler" as Scheduler
+participant "tick hook" as Tick
+participant "high probe" as High
+participant "peerA" as A
+participant "peerB" as B
+participant "verifier" as Verify
+
+A -> A : <b>08</b> marker before_raise
+A -> Scheduler : vTaskPrioritySet(high, 3)
+activate Scheduler
+Scheduler -> High : <b>09</b> immediate higher-priority selection
+activate High
+High -> High : marker HIGH
+High -> Scheduler : vTaskDelete(NULL)
+deactivate High
+Scheduler -> A : return to caller
+deactivate Scheduler
+||26||
+A -> A : <b>10</b> marker after_raise; request stop
+A -> Scheduler : self-delete after bounded cleanup
+B -> Scheduler : <b>11</b> second peer finishes and self-deletes
+||26||
+Scheduler -> Verify : <b>12</b> lowest-priority verifier publishes PASS
+
+note over Scheduler,Verify
+  Exact claim: marker projection before → HIGH → after.
+  Another Ready task may legally run before peerA is selected again.
+end note
+@enduml