Move lint to a parallel CI job to reduce build time

Remove lint from ci:build's serial dependency chain and run it as a
parallel taskTest job in the build-client pipeline. The local `build`
task still includes lint. This follows the approach from PR microsoft#25321 and
the discussion in PR microsoft#26596.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: frankmueller-msft

fluidBuild.config.cjs

@@ -34,7 +34,7 @@ module.exports = {
 		"ci:build": {
 			dependsOn: [
 				"compile",
-				"lint",
+				// "lint" — moved to parallel CI job (see build-client.yml taskTest)
 				"ci:build:api-reports",
 				"ci:build:docs",
 				"build:manifest",

tools/pipelines/build-client.yml

@@ -206,17 +206,16 @@ extends:
     poolBuild: Large-eastus2
     checkoutSubmodules: true
     taskBundleAnalysis: true
-    taskLint: false # Linting is captured by `ci:build` via fluid-build
+    taskLint: false # Linting runs as a parallel job via taskTest below
     taskBuildDocs: true
     publishDocs: true
     # We only care about pipeline run telemetry for the CI runs on the internal project, not for PR runs in the public
     # one. And since we don't batch commits for CI pipeline runs, the only reason we see for automated runs is IndividualCI.
     telemetry: ${{ eq(variables['Build.Reason'], 'IndividualCI') }}
     shouldShip: ${{ or(eq(variables['release'], 'release'), eq(variables['release'], 'prerelease')) }}
     taskTest:
-    # This check must be run after the build, since it relies on built files being present. Eventually it might be moved
-    # to the "pack" stage since it can use the already-packed packages in that case. As it is the pipeline packs some
-    # packages twice.
+    # This check must be run after the build, since it relies on built files being present.
+    - { name: "lint", jobName: "Lint" }
     - { name: "ci:test:jest", jobName: "JestTest" }
     - { name: "ci:test:realsvc:tinylicious", jobName: "RealsvcTinyliciousTest" }
     - { name: "ci:test:stress:tinylicious", jobName: "StressTinyliciousTest" }