chore: reduce global record max (75k -> 55k)

This brings it to only 5k above the per-edge max, which is 5k higher
than previous broken behavior. Should slightly improve overall
performance while still leaving possibility for some heavy queries to
continue.

src/dispatcher.ts

@@ -43,7 +43,7 @@ export default class SubQueryDispatcher {
     this.records = [];
     this.currentlyDispatched = 0;
     this.maxRecords = parseInt(process.env.MAX_RECORDS_PER_EDGE) || 50000;
-    this.globalMaxRecords = parseInt(process.env.MAX_RECORDS_TOTAL) || 75000;
+    this.globalMaxRecords = parseInt(process.env.MAX_RECORDS_TOTAL) || 55000;
     this.totalRecords = 0;
     this.done = false;
     this.logs = [];