chore: upgrade tshy, vitest, and typescript to latest major versions

CHANGELOG.md

@@ -2,8 +2,8 @@
 
 ### Dependencies
 
+- **Upgrade `tshy` to `^4.1.1`, `vitest`/`@vitest/coverage-istanbul` to `^4.1.4`, `typescript` to `^6.0.2`** — removed deprecated `baseUrl` from `tsconfig.base.json` (TS6), updated `paths` entry to use relative `./` prefix
 - **Upgrade OpenTelemetry to 2.x** — upgraded `@opentelemetry/resources` and `@opentelemetry/sdk-trace-base` from `^1.30.1` to `^2.6.1`; upgraded experimental packages (`sdk-node`, `instrumentation`, `exporter-trace-otlp-http`) from `^0.56.0` to `^0.214.0`; upgraded `auto-instrumentations-node` to `^0.72.0` and `semantic-conventions` to `^1.40.0`; migrated `new Resource()` to `resourceFromAttributes()` following the 2.x API change
-
 - **Upgrade `zod` from `^3.25.42` to `^4.3.6`** — migrated `z.record()` calls to require explicit key schema (`z.string()`), updated `.shape` access (no longer a function in v4), and fixed `denoise` default handling in `IsochroneTool` input schema
 
 ### New Features