fix(output): throw server error for streamed exceptions

[simPod]

Context

ClickHouse can emit streamed exception frames after response headers. JsonEachRow currently attempts to decode those frames as JSON, surfacing a JsonException instead of the client-level ServerError.

Decision

Detect exception frames while consuming JSONEachRow lines and rethrow them through ServerError::fromResponseContent().

Consequences

• Streaming JSONEachRow consumers preserve ClickHouse server-error semantics.
• Both string and stream-backed JSONEachRow outputs handle streamed exception frames consistently.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.99%. Comparing base (725353b) to head (e65943c).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #336      +/-   ##
==========================================
+ Coverage   95.94%   95.99%   +0.04%     
==========================================
  Files          42       42              
  Lines         839      849      +10     
==========================================
+ Hits          805      815      +10     
  Misses         34       34              

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[Copilot]

Pull request overview

This PR updates the JSONEachRow output decoder to detect ClickHouse streamed exception frames (__exception__ ...) during line-by-line decoding and rethrow them as ServerError, preserving client-level server error semantics for streaming consumers.

Changes:

• Detect __exception__ frames while iterating Output\JsonEachRow lines and throw ServerError::fromResponseContent(...) instead of surfacing a JsonException.
• Add test coverage ensuring both string-backed and stream-backed JSONEachRow contents throw ServerError on streamed exception frames.
• Update Format\JsonEachRow PHPDoc to reflect the additional thrown exception type.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
tests/Output/JsonEachRowTest.php	Adds a data-provider test verifying streamed exception frames throw ServerError for both strings and streams.
src/Output/JsonEachRow.php	Implements streamed exception frame detection during JSONEachRow decoding and rethrows as ServerError.
src/Format/JsonEachRow.php	Updates @throws annotations to include ServerError.

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[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated no new comments.