#123 fix(cli): clear recovered provider errors

Summary

• clear a remembered provider error when a later assistant completion finishes successfully
• allow a non-interactive run to exit successfully after automatic compaction recovers
• cover a 413 overflow followed by compaction and recovered output

Test plan

• bun test test/cli/run/run-process.test.ts --test-name-pattern "exits 0 when compaction recovers a provider size error"
• bun typecheck from packages/opencode
• repository pre-push typecheck (16 packages)

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Summary by cubic

Fixes CLI run error recovery so a recovered provider error no longer forces a failure. Non-interactive runs now exit 0 after automatic compaction successfully recovers from a size error.

• Bug Fixes
  • Clear a remembered provider error when an assistant completion finishes with finish and no error.
  • Allow non-interactive runs to exit 0 after auto-compaction recovers from a 413 provider size error.
  • Add a test covering 413 overflow → compaction → recovered output.