[clsi] initial implementation of compile from history (#31883)

* [clsi] initial implementation of compile from history

* [clsi] copy changes

* [saas-e2e] extend test case with nested folder

* [saas-e2e] add test case for tracked changes

* [web] fix accumulating changes from multiple chunks

* [web] optimize size check for compile request payload

* [clsi] deduplicate globalBlobs

* [clsi] add validation for request body details

* [clsi] add metrics for compile from history

* [clsi] download binary files concurrently

* [clsi] skip download of empty file blob

* [clsi] break down e2e compile time metric by compileFromHistory

GitOrigin-RevId: 0dadef93e89d8a172c35cb130a1042d9d1bec42a

services/web/scripts/e2e_test_setup.mjs

@@ -133,6 +133,26 @@ async function provisionSplitTests() {
       Path.join(MONOREPO, 'tools/saas-e2e/split-tests.json')
     )
   )
+  // Add WIP split test, we can update the JSON blob once this is in production
+  SPLIT_TESTS.push({
+    name: 'compile-from-history',
+    versions: [
+      {
+        versionNumber: 1,
+        createdAt: '2026-02-25T14:55:31.260Z',
+        active: true,
+        analyticsEnabled: false,
+        phase: 'release',
+        variants: [
+          {
+            name: 'enabled',
+            rolloutPercent: 0,
+            rolloutStripes: [],
+          },
+        ],
+      },
+    ],
+  })
   console.log(`> Importing ${SPLIT_TESTS.length} split-tests from production.`)
   await SplitTestManager.replaceSplitTests(SPLIT_TESTS)
 }