Page datastore queries that fetched all applications

ListApplications for piped, ListApplications for web, and the
application lookup in CreateDeploymentChain ran one query with no limit
and returned every matching row. A project with thousands of
applications pays for all of them on every sync even though the RPC
responses have no cursor field and cannot page.

These now fetch 100 rows at a time and combine the pages before
responding.

Paging by cursor needs a fixed sort order, so the queries sort by Id.

ListEvents also pages now. It defaults to newest first when a request
leaves the order unset, which previously errored on the second page.
(Also repairs the ListEvents pagination test to use the correct mock).

Added the composite indexes these query shapes need to
firestoreindexensurer; Firestore does not create them automatically.

Fixes #7051

Signed-off-by: srinivasr <sriniv4sreddy@gmail.com>

Author: srinivasr

pkg/app/ops/firestoreindexensurer/indexes.json

@@ -1,4 +1,114 @@
 [
+  {
+    "collectionGroup": "Application",
+    "queryScope": "COLLECTION",
+    "fields": [
+      {
+        "fieldPath": "ProjectId",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "PipedId",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Disabled",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Id",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      }
+    ]
+  },
+  {
+    "collectionGroup": "Application",
+    "queryScope": "COLLECTION",
+    "fields": [
+      {
+        "fieldPath": "ProjectId",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Id",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      }
+    ]
+  },
+  {
+    "collectionGroup": "Application",
+    "queryScope": "COLLECTION",
+    "fields": [
+      {
+        "fieldPath": "ProjectId",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Name",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Id",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      }
+    ]
+  },
+  {
+    "collectionGroup": "Application",
+    "queryScope": "COLLECTION",
+    "fields": [
+      {
+        "fieldPath": "ProjectId",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Kind",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Id",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      }
+    ]
+  },
+  {
+    "collectionGroup": "Application",
+    "queryScope": "COLLECTION",
+    "fields": [
+      {
+        "fieldPath": "ProjectId",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Name",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Kind",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Id",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      }
+    ]
+  },
   {
     "collectionGroup": "Application",
     "queryScope": "COLLECTION",
@@ -141,6 +251,27 @@
       }
     ]
   },
+  {
+    "collectionGroup": "Application",
+    "queryScope": "COLLECTION",
+    "fields": [
+      {
+        "fieldPath": "ProjectId",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Disabled",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Id",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      }
+    ]
+  },
   {
     "collectionGroup": "Command",
     "queryScope": "COLLECTION",
@@ -550,6 +681,53 @@
       }
     ]
   },
+  {
+    "collectionGroup": "Event",
+    "queryScope": "COLLECTION",
+    "fields": [
+      {
+        "fieldPath": "ProjectId",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "CreatedAt",
+        "order": "DESCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Id",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      }
+    ]
+  },
+  {
+    "collectionGroup": "Event",
+    "queryScope": "COLLECTION",
+    "fields": [
+      {
+        "fieldPath": "ProjectId",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Status",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "CreatedAt",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      },
+      {
+        "fieldPath": "Id",
+        "order": "ASCENDING",
+        "arrayConfig": ""
+      }
+    ]
+  },
   {
     "collectionGroup": "DeploymentChain",
     "queryScope": "COLLECTION",