fix(observability-map): use TypeScript 6 compatibility API

Author: carderne

internal-packages/observability-map/package.json

@@ -6,12 +6,13 @@
   "main": "./dist/src/index.js",
   "types": "./dist/src/index.d.ts",
   "dependencies": {
-    "typescript": "catalog:"
+    "@typescript/typescript6": "6.0.2"
   },
   "devDependencies": {
     "@types/node": "^24.13.3",
     "rimraf": "6.0.1",
     "tsx": "^4.19.2",
+    "typescript": "catalog:",
     "vitest": "4.1.7"
   },
   "scripts": {

internal-packages/observability-map/src/docstringReferences.test.ts

@@ -1,4 +1,4 @@
-import ts from "typescript";
+import ts from "@typescript/typescript6";
 import { readFileSync, readdirSync } from "node:fs";
 import { join, resolve } from "node:path";
 import { CHECKS } from "./checks/index.js";

internal-packages/observability-map/src/mutations.ts

@@ -1,4 +1,4 @@
-import ts from "typescript";
+import ts from "@typescript/typescript6";
 
 /**
  * Source-to-source mutations for the tree-scale corpus in `mutationCorpus.test.ts`. Why they are text

internal-packages/observability-map/src/scan.ts

@@ -1,4 +1,4 @@
-import ts from "typescript";
+import ts from "@typescript/typescript6";
 import { readdirSync, readFileSync } from "node:fs";
 import { join } from "node:path";
 import type { CatchEvidence, EntryPoint, LogCall } from "./types.js";

internal-packages/observability-map/src/suppression.ts

@@ -1,4 +1,4 @@
-import ts from "typescript";
+import ts from "@typescript/typescript6";
 import { CHECKS } from "./checks/index.js";
 
 const KNOWN_CHECK_IDS = new Set(CHECKS.map((c) => c.id));

internal-packages/observability-map/src/webappSymbols.test.ts

@@ -1,4 +1,4 @@
-import ts from "typescript";
+import ts from "@typescript/typescript6";
 import { readdirSync, readFileSync } from "node:fs";
 import { join, resolve } from "node:path";
 import { AUDIT_SYMBOLS } from "./checks/auditTrail.js";