misc / begin CAH work, much cleanup to do / conceptualizing so far only

cah/constructors.py

@@ -0,0 +1,12 @@
+#!/usr/bin/env python3.12
+
+class CAHClient:
+    def __init__(self,
+                 resource: str,
+                 platform: str,
+                 csid: str,
+                 connected_at: int):
+        self.resource: str = resource
+        self.platform: str = platform
+        self.csid: str = csid
+        self.connected_at: int = connected_at