fix(ts-sdk): send auth headers for execution price details

[realfishsam]

Summary

• Update TypeScript getExecutionPriceDetailed to use getAuthHeaders(), matching other authenticated SDK calls
• Add a hosted dispatch regression test asserting the bearer auth header is sent

Fixes #931

Test Plan

• RED: added focused Jest test and confirmed it failed because Authorization was missing
• GREEN: npm test -- --runInBand tests/hosted-dispatch.test.ts -t 'getExecutionPriceDetailed sends hosted bearer auth header'
• npm test -- --runInBand tests/hosted-dispatch.test.ts

Note: local test bootstrap required temporary ignored generated OpenAPI stubs because this runner lacks Java for the generator; committed changes are only client/test files.

[realfishsam]

CI note from launcher: the focused regression test passes locally, but three generated-sync checks are red. I inspected the failed logs; the generator diffs remove existing hosted-mode sections from generated client outputs and update broad API reference/model docs unrelated to this two-line auth fix. I did not commit those broad generated diffs into this PR. Local environment also lacks Java, so full OpenAPI generation cannot run here.