refactor: [PRODUCT-465] use logs2 instead of logs REST endpoint

[sigmachirality]

Reimplement vm logs using v0/logs2 instead of v0/logs.

[semanticdiff-com]

Review changes with  

Changed Files

File	Status
src/lib/vm.ts	27% smaller

[greptile-apps]

Greptile Summary

This PR refactors the VM logs functionality to use a new /v0/vms/logs2 endpoint, representing a significant improvement in robustness and type safety. The changes include:

• Migration from timestamp-based to sequence-number-based log following
• Implementation of proper UTF-8 decoding with incomplete line handling
• Integration with strongly-typed API responses using generated types
• Required instance ID parameter for better UX
• RFC3339 timestamp validation

This change aligns with modern TypeScript practices by leveraging generated types from schema.ts, which provides better compile-time checking and API contract adherence. The new chunk processing logic with TextDecoder is particularly noteworthy as it properly handles UTF-8 encoded binary data and incomplete log lines across chunks, fixing potential character encoding issues that could exist in the previous implementation.

Confidence score: 4/5

1. This PR is safe to merge with proper testing of log retrieval scenarios
2. High score due to improved type safety, better error handling, and proper text encoding, but held back one point due to the complexity of log processing logic that could benefit from additional test coverage
3. Files needing attention:
   • src/lib/vm.ts: Focus on testing the new chunk processing logic and sequence-number-based following mechanism

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