test(vnext): make worker evidence hermetic

Author: Light2Dark

docs/adr/0004-isolated-parser-execution.md

@@ -234,11 +234,11 @@ that entry does not exist. The protocol PR must move the worker implementation
 behind the packed package boundary and remove the fixture's direct parser
 dependency before making a public packaging claim.
 
-The latest local Node 24 / Chromium 149 / arm64 macOS sample recorded:
+A representative local Node 24 / Chromium 149 / arm64 macOS sample recorded:
 
 | Output | Raw | gzip |
 | --- | ---: | ---: |
-| Core-only fixture | 24,680 B | 7,572 B |
+| Core-only fixture | 24,056 B | 7,497 B |
 | PostgreSQL transitive worker graph | 321,156 B | 67,396 B |
 | BigQuery transitive worker graph | 225,309 B | 50,389 B |
 | Complete worker fixture | 549,885 B | 118,160 B |
@@ -254,10 +254,10 @@ One sequential cold/warm run on the shared worker measured:
 
 | Dialect | Grammar load and initialization | First parse | First round trip | Warm parse | Warm round trip |
 | --- | ---: | ---: | ---: | ---: | ---: |
-| PostgreSQL | 8.2 ms | 2.3 ms | 10.7 ms | 0.2 ms | 0.2 ms |
-| BigQuery | 4.3 ms | 2.2 ms | 6.7 ms | 0.3 ms | 0.3 ms |
+| PostgreSQL | 8.0 ms | 2.4 ms | 10.6 ms | 0.1 ms | 0.3 ms |
+| BigQuery | 4.2 ms | 2.5 ms | 6.7 ms | 0.2 ms | 0.4 ms |
 
-The worker ready handshake took 7.4 ms in that run.
+The worker ready handshake took 10.3 ms in that run.
 
 These numbers establish packaging feasibility and initial size guards. They
 are not percentile claims. Stable latency decisions require repeated,

test/worker-placement/README.md

@@ -5,7 +5,9 @@ exact tarball created by `pnpm pack`. It is intentionally not a workspace
 package. Its direct `node-sql-parser` dependency is intentional: the frozen
 fixture dependencies are installed before the exact tarball is extracted, and
 the harness verifies that its exact `5.4.0` version matches the packed
-package's dependency.
+package's dependency. The fixture workspace pins Vite's floating transitive
+versions to the exact versions in the root lock, so the nested frozen install
+can run offline after a clean root CI install.
 
 The minified Vite 8 single-worker baseline is 67,396 gzip bytes for the
 PostgreSQL transitive graph, 50,389 gzip bytes for the BigQuery transitive

test/worker-placement/pnpm-lock.yaml

@@ -0,0 +1,7 @@
+packages:
+  - .
+
+overrides:
+  lightningcss: 1.32.0
+  nanoid: 3.3.15
+  postcss: 8.5.16

test/worker-placement/pnpm-workspace.yaml

@@ -1,6 +1,15 @@
 import { resolve } from "node:path";
 import { defineConfig } from "vite";
 
+const fixtureRoot = `${import.meta.dirname.replaceAll("\\", "/")}/`;
+
+function normalizeModuleId(moduleId) {
+  const normalized = moduleId.replaceAll("\\", "/");
+  return normalized.startsWith(fixtureRoot)
+    ? normalized.slice(fixtureRoot.length)
+    : normalized;
+}
+
 function moduleTrace() {
   return {
     name: "worker-placement-core-module-trace",
@@ -13,7 +22,7 @@ function moduleTrace() {
           imports: [...chunk.imports].sort(),
           isEntry: chunk.isEntry,
           moduleIds: Object.keys(chunk.modules)
-            .map((moduleId) => moduleId.replaceAll("\\", "/"))
+            .map(normalizeModuleId)
             .sort(),
         }))
         .sort((left, right) =>