change the real-time network stats lambda to return a nodeCounts object instead of a nodes array

[gruns]

current "nodes" array looks like:

"nodes":[
   {"count":563,"state":"active"},
   {"count":2,"state":"down"},
   {"count":8,"state":"inactive"}]

new object should look like this:

"nodeCounts": {
   "inactive": 563,
   "down": 2,
   "inactive": 8}

why the change? bc the former led to a bug where the first entry in the "nodes" array was implicitly assumed to be the "active" nodes. which it was not always. only sometimes

thus the bug fix was to loop through the entries. this 10 lines of js:

• 532bdc6

which goes away entirely with the better nodeCounts datastructure:

const pops = jsonResponse?.nodeCounts?.active || [default]