chore: TFY sandbox should discover working directory before writing files

[sr07asthana]

…iles

Summary

Closes #

Changes

How was this tested?

Checklist

• I have read the contributing guidelines
• pnpm build, pnpm test, pnpm typecheck, pnpm lint:ci, and pnpm format:check pass locally
• Tests added/updated where it makes sense
• No hand-edits to generated code (packages/trueforge-sdk, .github/fern/openapi/openapi.json, docs/openapi.json) — fork PRs omit SDK regen; maintainers regenerate after merge
• Docs / .env.example updated if configuration or behavior changed

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Note

Low Risk
Prompt-only change to TFY sandbox instructions; no exec, path, or auth logic is modified.

Overview
Updates TFY sandbox agent prompt rules so the model is told to run pwd as its first sandbox command and treat uploads, skills, and tool-results as living in that discovered working directory, instead of assuming a fixed “sandbox working directory” label.

Tests in tfyLayout.test.ts now assert the new pwd line and the “that working directory” wording. A patch changeset records the @truefoundry/trueforge-core release note.

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[changeset-bot]

🦋 Changeset detected

Latest commit: 5a75de8

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@truefoundry/trueforge-core	Patch
@truefoundry/trueforge	Patch

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