WIP(meteor3): server BOOTS on 3.1 + Mongo 7; restivus async-patched

Major milestone: the Meteor 3.1 server boots and runs against dockerized
MongoDB 7, and the REST framework responds (status/uptime OK).

- collection2 v4: import its eager entry 'meteor/aldeed:collection2/static.js'
  from new eager files server|client/00-collection2-init.js so main.js runs and
  patches attachSchema before collections load (v4 is fully lazy, no main module).
- fixtures.js disabled: @cleverbeagle/seeder uses sync Mongo, no Meteor 3 support
  (dev fixtures, not needed for smoke). Debt.
- sitemaps.js disabled: gadicohen:sitemaps@0.0.17 pre-0.9 API, no 'sitemaps'
  global on Meteor 3. Debt (SEO).
- Vendored restivus patched for async endpoints: route handler is async and
  awaits _callEndpoint; _callEndpoint awaits the action + auth/role checks.

NEXT: Rest.js endpoints + helpers (countRealFires/firesUnion/whichAreFalsePositives/
fireFromHash/subscriptionsInsert/upsertFalsePositive) still use sync Mongo
(.count()/.findOne()/.fetch()/.insert()/.upsert()) -> convert to *Async, then
smoke test against Mongo 7.

client/00-collection2-init.js

@@ -0,0 +1,3 @@
+// See server/00-collection2-init.js. collection2 v4's static.js is the eager
+// entry that runs main.js (patches attachSchema) before any collection loads.
+import 'meteor/aldeed:collection2/static.js';

client/main.js

@@ -1,3 +1,5 @@
+// collection2 v4 is lazy with no main module: import the exported Collection2
+// so main.js runs and patches attachSchema before any collection loads.
 import '../imports/startup/client';
 
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