refactor(javascript): break the semantic analysis import cycle (#8063)

* refactor(javascript): break the semantic analysis import cycle

Split shared semantic facts out of the analysis hub so projectors of
effects, evaluation, and identity no longer import one another in a cycle.

* refactor(javascript): share the import specifier reader

Read static imports in one module used by the boundary checker and both
cycle guards, so those rules cannot drift apart.

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Co-authored-by: Cursor Agent <cursoragent@cursor.com>

src/domain/javascript/javascriptSemanticIterationFacts.ts

@@ -0,0 +1,19 @@
+import type * as t from "@babel/types";
+import type { JavaScriptSemanticPropertyPath } from "./javascriptSemanticPropertyPaths.js";
+
+/** Shared shape of an iterator or property-read source. */
+export interface IterationSourceValue {
+  readonly node: t.Node;
+  readonly projection: JavaScriptSemanticPropertyPath;
+  readonly iterationSources?: readonly IterationSourceValue[];
+}
+
+/** An iterator receiver or property reference store, with default guards. */
+export interface SemanticIterationSource extends IterationSourceValue {
+  readonly iterationSources?: readonly IterationSourceValue[];
+  readonly kind: "iteration" | "reference-store";
+  readonly mutation: t.Node;
+  readonly target?: t.MemberExpression;
+  readonly fallbackSources?: readonly IterationSourceValue[];
+  readonly requiredSources?: readonly IterationSourceValue[];
+}