Claude/fix tool calling deepseek

[farzanshibu]

This pull request introduces several important updates across the codebase, primarily focusing on improving type safety, adding support for DeepSeek tool calls, and correcting import paths. The most significant changes include enhancements to the DeepSeek provider to support tool calls, adjustments to type handling in Bedrock and DeepSeek response transforms, and standardization of import paths for the RealTimeLLMEventParser. Additionally, there are minor improvements to ensure robustness in logging logic. #1555

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)

[Copilot]

Pull request overview

Updates provider transforms and request configs to improve type-safety and add DeepSeek tool-calling support, while also standardizing the realtime event parser import path and hardening logging.

Changes:

• Add tools / tool_choice support and tool-call passthrough to the DeepSeek chat completion provider (plus extensive unit tests).
• Adjust finish-reason / stop-reason typing and transforms across providers (notably Bedrock ↔ Anthropic stop reasons).
• Standardize RealTimeLLMEventParser import path casing and minor robustness tweaks in winky logging.

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/services/winky/index.ts	Hardens handling of missing ai_model when calculating redaction, pricing, and metrics labels.
src/providers/utils.ts	Changes Anthropic stop-reason transform return type.
src/providers/deepseek/types.ts	Introduces DeepSeek tool-call typing.
src/providers/deepseek/chatComplete.ts	Adds tool-call support in request config and response/stream transforms.
src/providers/deepseek/tests/chatComplete.test.ts	Adds DeepSeek provider coverage (params, tool calls, finish reasons, streaming).
src/providers/bedrock/messages.ts	Adapts Bedrock Messages transforms to new stop-reason typing (currently via casts).
src/handlers/websocketUtils.ts	Updates realtime parser import path.
src/handlers/realtimeHandlerNode.ts	Updates realtime parser import path.
src/handlers/realtimeHandler.ts	Updates realtime parser import path.
package-lock.json	Updates lockfile (adds optional snappy native deps and modifies dev/optional flags).

Comments suppressed due to low confidence (1)

src/providers/utils.ts:99

• transformToAnthropicStopReason now declares a | null return type, but the implementation never returns null (it always falls back to end_turn). This type change forces downstream as any/as string assertions and reduces type-safety. Either (a) revert the return type to ANTHROPIC_STOP_REASON or (b) actually return null in the cases where callers expect it and update call sites accordingly.

export const transformToAnthropicStopReason = (
  finishReason?: PROVIDER_FINISH_REASON
): ANTHROPIC_STOP_REASON | null => {
  if (!finishReason) return ANTHROPIC_STOP_REASON.end_turn;
  const transformedFinishReason = AnthropicFinishReasonMap.get(finishReason);
  if (!transformedFinishReason) {
    return ANTHROPIC_STOP_REASON.end_turn;
  }
  return transformedFinishReason;

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[roh26it]

@farzanshibu - thanks for the PR! Can you address Copilot's comments?

[Copilot]

Pull request overview

Copilot reviewed 8 out of 9 changed files in this pull request and generated 3 comments.

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[farzanshibu]

@roh26it Please check