feat: publish FreeRTOS C FC03 card

doc/assets/a2-structure.puml

@@ -0,0 +1,53 @@
+@startuml
+!include card-uml-style.iuml
+scale 900 width
+left to right direction
+
+class "01  PeerContext [2]" as Peers <<C struct>> {
+  id : uint32_t
+  configured_priority : UBaseType_t = 2
+  handle : TaskHandle_t
+  iterations · checksum
+  first_tick · last_tick
+  entry_sp · stack range
+}
+
+class "02  HighProbeContext" as Probe <<C struct>> {
+  initial_priority = 0
+  target_priority = 3
+  handle : TaskHandle_t
+  run_tick
+  ran_before_caller_returned
+}
+
+class "03  VerifierContext" as Verify <<C struct>> {
+  configured_priority = 1
+  handle : TaskHandle_t
+  pass
+}
+
+class "04  switch trace" as SwitchTrace <<bounded record>> {
+  task[16]
+  tick[16]
+  count · changes
+  captured A · B · A
+}
+
+class "05  preemption markers" as OrderTrace <<bounded record>> {
+  1 = before_raise
+  2 = high_probe
+  3 = after_raise
+}
+
+Peers --> SwitchTrace : one entry per observed task change
+Peers --> Probe : vTaskPrioritySet(handle, 3)
+Probe --> OrderTrace : marker 2
+Peers --> OrderTrace : markers 1 and 3
+Verify --> Peers : checks both
+Verify --> Probe : checks preemption proof
+
+note bottom of SwitchTrace
+  A→B→A is a committed subsequence.
+  Repeated loop iterations are not logged.
+end note
+@enduml