[web] resync_projects: use the secondaries for all reads (#33684)

* [docstore] add useSecondary flag to projectHasRanges

The rev-check for unarchiving always consults with the primary.

Two extra changes:
- Add a projection argument to peekDoc in order to skip lines download
   from projectHasRanges.
- Add one retry to peekDoc to reduce chances of surfacing a rev-check
   violation.

* [web] resync_projects: use the secondaries for all reads

* [web] add default value for useSecondary

* [docstore] add default value for useSecondary

* [k8s] docstore: set MONGO_HAS_SECONDARIES=true

GitOrigin-RevId: f15ec4fdc1cabe74c1eab87bec85f28d6f7a587d

services/docstore/app/js/HttpController.js

@@ -22,7 +22,14 @@ async function getDoc(req, res) {
 async function peekDoc(req, res) {
   const { doc_id: docId, project_id: projectId } = req.params
   logger.debug({ projectId, docId }, 'peeking doc')
-  const doc = await DocManager.peekDoc(projectId, docId)
+  const doc = await DocManager.peekDoc(projectId, docId, {
+    deleted: true,
+    inS3: true,
+    lines: true,
+    ranges: true,
+    rev: 1,
+    version: true,
+  })
   res.setHeader('x-doc-status', doc.inS3 ? 'archived' : 'active')
   res.json(_buildDocView(doc))
 }
@@ -121,7 +128,11 @@ async function getTrackedChangesUserIds(req, res) {
 
 async function projectHasRanges(req, res) {
   const { project_id: projectId } = req.params
-  const projectHasRanges = await DocManager.projectHasRanges(projectId)
+  const useSecondary = req.query.useSecondary === 'true'
+  const projectHasRanges = await DocManager.projectHasRanges(
+    projectId,
+    useSecondary
+  )
   res.json({ projectHasRanges })
 }