chore: preserve FreeRTOS and C series updates

series/freertos-c.json

@@ -14,7 +14,7 @@
       "id": "FC01",
       "repo": "lab-rv32i-freertos-heap4",
       "branch": "main",
-      "title": "heap_1–heap_5 and heap_4 mechanics"
+      "title": "heap_4: From Linear Cursor to Reusable Blocks"
     },
     {
       "id": "FC02",
@@ -75,6 +75,30 @@
       "repo": "lab-rv32i-freertos-c-static-allocation",
       "branch": "main",
       "title": "Static Allocation and Bounded Storage"
+    },
+    {
+      "id": "FC12",
+      "repo": "lab-rv32i-freertos-c-diagnostics",
+      "branch": "main",
+      "title": "Assertions, Hooks, Stack Checks and Runtime Diagnostics"
+    },
+    {
+      "id": "FC13",
+      "repo": "lab-rv32i-freertos-c-uart",
+      "branch": "main",
+      "title": "UART Interrupt-to-task Pipeline"
+    },
+    {
+      "id": "FC14",
+      "repo": "lab-rv32i-freertos-c-gpio-timer",
+      "branch": "main",
+      "title": "GPIO, Hardware Timer and Deferred Work"
+    },
+    {
+      "id": "FC15",
+      "repo": "lab-rv32i-freertos-c-integration",
+      "branch": "main",
+      "title": "Integrated Deterministic FreeRTOS C Application"
     }
   ]
 }