Resolve "Implement platform_ID for instruction_set"

Closes #84 (closed)

examples/mas-dt/platform_instruction_set.json

+{
+  "header": {
+    "message_ID": "b427003c-0000-11aa-a1eb-b1cdf2342fdd",
+    "timestamp": "2024-09-03T00:00:00Z",
+    "version": 1,
+    "source": "ori",
+    "destination": "internal.noc.slocum.unit_111.to_platform.instruction_set",

[Owain Jones]

A nitpick but platform_instruction_set in the destination to be consistent with the message type?

I have almost identical file in the unit tests for sfmc-adapter except for that 1 line

"destination": "internal.noc.slocum.unit_111.to_platform.platform_instruction_set",

[Dan Jones]

Yep. Missed that. That's not nit-picking. That was wrong. I've also made the first term mas-dt to match the other example messages in the mas-dt folder.