fix(javascript): yield during per-file projection and graph construction (#1525)

analyze_javascript_application ran several long phases with no event-loop
turn, so MCP ping and cancellation waited: each file's parse, analysis and
semantic projection; building every application node and relationship
before the application graph's first sealing step; and whole-graph schema
parses inside both immutable graph factories.

- Each file runs as steps (parse, static analysis, semantic analysis, then
  each projection pass), driven by the existing time-sliced checkpoint.
- Application graph input construction yields between phases, per module
  link and per file of findings.
- The pipeline transfers its privately built graph inputs to new sealing
  steps that validate the graph's own fields synchronously and elements,
  content checks and the digest in steps. The public copying factories
  keep their synchronous capture.

Results are unchanged: graph IDs and the complete result digest match main
on five inputs including Obsidian's 23 MB obsidian.asar. On the issue's
1,200-function fixture the longest event-loop block falls from about
290 ms to 90 ms, and ping after abort from up to 286 ms to at most 56 ms.
On obsidian.asar it falls from 10.9 s to 5.4 s; the rest is one analyzer
stage of a single very large file.

Refs #1462

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
Co-authored-by: N0zoM1z0 <161784452+N0zoM1z0@users.noreply.github.com>

src/domain/javascript/javascriptSemanticGraph.ts

@@ -6,6 +6,10 @@ import { uniqueSorted } from "../canonicalOrdering.js";
 import { compareUnicodeCodePoints } from "../unicodeCodePointOrder.js";
 import { canonicalJsonDigestSteps } from "../canonicalJsonDigestSteps.js";
 import { freezeOwnedJsonSnapshotSteps } from "../immutableJson.js";
+import {
+  arrayContainerSchema,
+  parseElementSteps,
+} from "../zodCollectionSteps.js";
 import type {
   ApplicationGraphEvidence,
   ApplicationGraphEvidenceContext,
@@ -765,6 +769,15 @@ export const createJavaScriptSemanticGraph = (
 
 const validatedImmutableSemanticGraphs = new WeakSet<object>();
 
+const semanticGraphShape = javaScriptSemanticGraphInputSchema.shape;
+const semanticGraphContainerSchema = javaScriptSemanticGraphInputSchema.extend({
+  evidence_contexts: arrayContainerSchema(semanticGraphShape.evidence_contexts),
+  nodes: arrayContainerSchema(semanticGraphShape.nodes),
+  relations: arrayContainerSchema(semanticGraphShape.relations),
+  fingerprints: arrayContainerSchema(semanticGraphShape.fingerprints),
+  unknowns: arrayContainerSchema(semanticGraphShape.unknowns),
+});
+
 /** Clone input synchronously; commit, check and seal the owned graph in steps. */
 export const createImmutableJavaScriptSemanticGraphSteps = (
   input: unknown,
@@ -773,6 +786,58 @@ export const createImmutableJavaScriptSemanticGraphSteps = (
     normalizeGraphInput(javaScriptSemanticGraphInputSchema.parse(input)),
   );
 
+/**
+ * Seal a graph whose input the caller transfers: the caller neither retains nor
+ * mutates any part of it afterwards. Only the graph's own fields are validated
+ * synchronously; collection elements are validated and cloned in steps, because
+ * a whole-graph parse of a large application held the event loop for seconds.
+ */
+export const sealTransferredJavaScriptSemanticGraphSteps = (
+  input: unknown,
+): Generator<void, JavaScriptSemanticGraph> =>
+  parseAndSealSemanticGraphSteps(semanticGraphContainerSchema.parse(input));
+
+function* parseAndSealSemanticGraphSteps(
+  container: z.output<typeof semanticGraphContainerSchema>,
+): Generator<void, JavaScriptSemanticGraph> {
+  const issues: z.core.$ZodIssue[] = [];
+  const parsed: JavaScriptSemanticGraphInput = {
+    ...container,
+    evidence_contexts: yield* parseElementSteps(
+      semanticGraphShape.evidence_contexts.element,
+      container.evidence_contexts,
+      ["evidence_contexts"],
+      issues,
+    ),
+    nodes: yield* parseElementSteps(
+      semanticGraphShape.nodes.element,
+      container.nodes,
+      ["nodes"],
+      issues,
+    ),
+    relations: yield* parseElementSteps(
+      semanticGraphShape.relations.element,
+      container.relations,
+      ["relations"],
+      issues,
+    ),
+    fingerprints: yield* parseElementSteps(
+      semanticGraphShape.fingerprints.element,
+      container.fingerprints,
+      ["fingerprints"],
+      issues,
+    ),
+    unknowns: yield* parseElementSteps(
+      semanticGraphShape.unknowns.element,
+      container.unknowns,
+      ["unknowns"],
+      issues,
+    ),
+  };
+  if (issues.length > 0) throw new z.ZodError(issues);
+  return yield* validateAndSealSemanticGraphSteps(normalizeGraphInput(parsed));
+}
+
 function* validateAndSealSemanticGraphSteps(
   semantic: JavaScriptSemanticGraphInput,
 ): Generator<void, JavaScriptSemanticGraph> {