chore: upgrade to typescript 6 (#4310)

## Summary

Upgrades the workspace to TypeScript 6.0.3 and applies the compiler,
type, and build configuration changes required to preserve package
layouts and existing runtime behavior, apart from correcting the HTTP
status field used for deployment connection errors.

## Compatibility

- Centralizes TypeScript 6.0.3 through the pnpm workspace catalog.
- Replaces compiler options and module resolution modes that TypeScript
6 no longer accepts.
- Restores explicit Node types where TypeScript 6 no longer includes
them transitively.
- Adds explicit declaration build roots that preserve each package's
existing output layout.
- Patches tsup to stop injecting the removed `baseUrl` option during
declaration builds.
- Uses type-only assertions for stricter typed-array and stream
definitions without changing runtime behavior.
- Reads the EventSource v3 HTTP status from `code`, so deployment
connection errors include it correctly.
- Keeps standalone CLI compatibility fixtures pinned to their existing
TypeScript version and lockfiles.

`turbo run typecheck` and the complete PR test suite are green.

Author: carderne

.configs/tsconfig.base.json

@@ -26,7 +26,6 @@
     "esModuleInterop": true,
     "emitDecoratorMetadata": false,
     "experimentalDecorators": false,
-    "downlevelIteration": true,
     "isolatedModules": true,
     "noUncheckedIndexedAccess": true,
 

apps/webapp/app/routes/otel.v1.logs.ts

@@ -21,7 +21,9 @@ export async function action({ request }: ActionFunctionArgs) {
         await exporter.exportLogsRaw(new Uint8Array(buffer));
 
         return new Response(
-          ExportLogsServiceResponse.encode(ExportLogsServiceResponse.create()).finish(),
+          ExportLogsServiceResponse.encode(
+            ExportLogsServiceResponse.create()
+          ).finish() as Uint8Array<ArrayBuffer>,
           { status: 200 }
         );
       }
@@ -30,9 +32,12 @@ export async function action({ request }: ActionFunctionArgs) {
 
       const exportResponse = await exporter.exportLogs(exportRequest);
 
-      return new Response(ExportLogsServiceResponse.encode(exportResponse).finish(), {
-        status: 200,
-      });
+      return new Response(
+        ExportLogsServiceResponse.encode(exportResponse).finish() as Uint8Array<ArrayBuffer>,
+        {
+          status: 200,
+        }
+      );
     } else {
       return new Response(
         "Unsupported content type. Must be either application/x-protobuf or application/json",

apps/webapp/app/routes/otel.v1.metrics.ts

@@ -25,7 +25,9 @@ export async function action({ request }: ActionFunctionArgs) {
         await exporter.exportMetricsRaw(new Uint8Array(buffer));
 
         return new Response(
-          ExportMetricsServiceResponse.encode(ExportMetricsServiceResponse.create()).finish(),
+          ExportMetricsServiceResponse.encode(
+            ExportMetricsServiceResponse.create()
+          ).finish() as Uint8Array<ArrayBuffer>,
           { status: 200 }
         );
       }
@@ -34,9 +36,12 @@ export async function action({ request }: ActionFunctionArgs) {
 
       const exportResponse = await exporter.exportMetrics(exportRequest);
 
-      return new Response(ExportMetricsServiceResponse.encode(exportResponse).finish(), {
-        status: 200,
-      });
+      return new Response(
+        ExportMetricsServiceResponse.encode(exportResponse).finish() as Uint8Array<ArrayBuffer>,
+        {
+          status: 200,
+        }
+      );
     } else {
       return new Response(
         "Unsupported content type. Must be either application/x-protobuf or application/json",

apps/webapp/app/routes/otel.v1.traces.ts

@@ -21,7 +21,9 @@ export async function action({ request }: ActionFunctionArgs) {
         await exporter.exportTracesRaw(new Uint8Array(buffer));
 
         return new Response(
-          ExportTraceServiceResponse.encode(ExportTraceServiceResponse.create()).finish(),
+          ExportTraceServiceResponse.encode(
+            ExportTraceServiceResponse.create()
+          ).finish() as Uint8Array<ArrayBuffer>,
           { status: 200 }
         );
       }
@@ -30,9 +32,12 @@ export async function action({ request }: ActionFunctionArgs) {
 
       const exportResponse = await exporter.exportTraces(exportRequest);
 
-      return new Response(ExportTraceServiceResponse.encode(exportResponse).finish(), {
-        status: 200,
-      });
+      return new Response(
+        ExportTraceServiceResponse.encode(exportResponse).finish() as Uint8Array<ArrayBuffer>,
+        {
+          status: 200,
+        }
+      );
     } else {
       return new Response(
         "Unsupported content type. Must be either application/x-protobuf or application/json",

apps/webapp/app/services/realtime/redisRealtimeStreams.server.ts

@@ -321,7 +321,9 @@ export class RedisRealtimeStreams implements StreamIngestor, StreamResponder {
     let currentChunkIndex = startChunk;
 
     try {
-      const textStream = stream.pipeThrough(new TextDecoderStream());
+      const textStream = stream.pipeThrough(
+        new TextDecoderStream() as ReadableWritablePair<string, Uint8Array>
+      );
       const reader = textStream.getReader();
 
       while (true) {

apps/webapp/tsconfig.check.json

@@ -10,5 +10,5 @@
     },
     "customConditions": []
   },
-  "exclude": ["**/*.test.ts", "**/*.test.tsx"]
+  "exclude": ["**/*.test.ts", "**/*.test.tsx", "test/setup-test-env.ts"]
 }

apps/webapp/tsconfig.json

@@ -17,7 +17,6 @@
     "skipLibCheck": true,
     "experimentalDecorators": true,
     "emitDecoratorMetadata": true,
-    "baseUrl": ".",
     "paths": {
       "~/*": ["./app/*"],
       "@/*": ["./*"]

internal-packages/cache/tsconfig.json

@@ -6,7 +6,7 @@
     "moduleResolution": "Node16",
     "moduleDetection": "force",
     "verbatimModuleSyntax": false,
-    "types": ["vitest/globals"],
+    "types": ["vitest/globals", "node"],
     "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
     "isolatedModules": true,

internal-packages/clickhouse/tsconfig.build.json

@@ -2,6 +2,8 @@
   "include": ["src/**/*.ts"],
   "exclude": ["src/**/*.test.ts"],
   "compilerOptions": {
+    "types": ["node"],
+    "rootDir": ".",
     "composite": true,
     "target": "ES2019",
     "lib": ["ES2019", "DOM", "DOM.Iterable", "DOM.AsyncIterable"],

internal-packages/clickhouse/tsconfig.test.json

@@ -9,7 +9,7 @@
     "moduleResolution": "Node16",
     "moduleDetection": "force",
     "verbatimModuleSyntax": false,
-    "types": ["vitest/globals"],
+    "types": ["vitest/globals", "node"],
     "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
     "isolatedModules": true,