build: rename build:src and build:test to build:artifacts and build:check

build:artifacts produces every artifact, including the tsdown bundles,
the Desktop bundle, and Web, so naming it after sources undersold it;
build:check checks scripts, benchmarks, and website code besides tests.
The build.ts scopes, aggregate step ids, the Python builder flag
(--build-artifacts), workflows, callers, docs, and the build-split Agent
Note follow the new names. The note also records the naming
alternatives.

Refs #5852

.github/workflows/build-exe-for-python-sdk.yml

@@ -266,7 +266,7 @@ jobs:
           DSH_BUILD_CLIENT_PROFILE: official
         run: >-
           pnpm exec tsx scripts/build-exe-for-python-sdk.ts --targets=${{ matrix.target }}
-          ${{ inputs.ci && github.event_name == 'pull_request' && '--build-src' || '' }}
+          ${{ inputs.ci && github.event_name == 'pull_request' && '--build-artifacts' || '' }}
 
       - name: Resolve platform outputs (POSIX)
         id: runtime-posix

.github/workflows/build-preview-cloudflare.yml

@@ -71,7 +71,7 @@ jobs:
       # build:preview packs the image through the packer's installed bin
       # (lib/bin.js), so neither half exists before the artifact build runs.
       - name: Build workspace
-        run: pnpm run build:src
+        run: pnpm run build:artifacts
 
       - name: Build the preview page and pack the VFS image
         env:

.github/workflows/e2e.yml

@@ -107,7 +107,7 @@ jobs:
       # the built artifact under plain Node, resolving plugins through real package
       # exports — the shape a real consumer runs. That requires a prior build.
       - name: Build (lib for the e2e example bins)
-        run: ${{ github.event_name == 'pull_request' && 'pnpm run build:src --profile official' || 'pnpm run build:official' }}
+        run: ${{ github.event_name == 'pull_request' && 'pnpm run build:artifacts --profile official' || 'pnpm run build:official' }}
 
       - name: Prepare Office runtime
         run: pnpm run prepare:primary-runtime --target linux-x64 --output .cache/e2e-office

.github/workflows/release.yml

@@ -146,7 +146,7 @@ jobs:
         run: pnpm run release:verify --family dsh
 
       - name: Build
-        run: ${{ github.event_name == 'pull_request' && 'pnpm run build:src --profile official' || 'pnpm run build:official' }}
+        run: ${{ github.event_name == 'pull_request' && 'pnpm run build:artifacts --profile official' || 'pnpm run build:official' }}
 
       # Concurrency here is rehearsal-only: the credentialed publish workflows
       # invoke release:pack without the flag and keep the strictly serial path.