Record tool call ID

[dannykopping]

Capture the provider's tool call ID from the response when a tool result is submitted.
We'll use this ID to infer a relationship between two interceptions when the tool call result is received.

Note: this does not need to apply to injected tools since those all occur within the context of one interception anyway (inner agentic loop).

Acceptance criteria:

• Tool call ID is determined from all interceptor implementations
  • Messages
    • blocking
    • streaming
  • Chat Completions
    • blocking
    • streaming
  • Responses
    • blocking
    • streaming
• Recorder types updated
• Tests added

See POC (intercept/messages/streaming.go)