split presence data object into file; improve service encapsulations

Signed-off-by: Jason Volk <jason@zemos.net>

Cargo.toml

@@ -851,6 +851,7 @@ style = { level = "warn", priority = -1 }
 ## some sadness
 # trivial assertions are quite alright
 assertions_on_constants = { level = "allow", priority = 1 }
+module_inception = { level = "allow", priority = 1 }
 
 ###################
 suspicious = { level = "warn", priority = -1 }