feat: publish FreeRTOS C FC02 card

doc/assets/a3-dispatch.puml

@@ -0,0 +1,23 @@
+@startuml
+!include card-uml-style.iuml
+scale 900 width
+top to bottom direction
+
+class "01  TaskFunction_t\nvoid (*)(void*)" as Callback <<C ABI>>
+class "02  xTaskCreate\nentry + &workerA" as Create <<boundary>>
+class "03  callback entry\na0 = pvParameters" as Entry <<runtime>>
+class "04  typed pointer\nWorkerContext *worker =\n(WorkerContext *)pvParameters" as Cast <<C>>
+class "05  typed calculation\nworker->result = sum" as Work <<application>>
+class "06  wrong-cast exhibit\nC cannot verify context type" as Hazard <<compile-time check>>
+
+Callback -right-> Create : accepted signature
+Create -right-> Entry : scheduler dispatch
+Entry -down-> Cast : same address
+Cast -left-> Work : typed fields
+Work -left-> Hazard : contrast: unchecked cast
+
+note bottom of Entry
+  RV32 ILP32 ABI carries the first callback argument in a0.
+  The explicit C cast documents intent; it performs no type check.
+end note
+@enduml