[Platform][Anthropic] Fix TypeError in AssistantMessageNormalizer when toolCalls is null

[Muneer-Shafi]

Q	A
Bug fix?	yes
New feature?	no
Deprecations?	no
Issues	Fix #302
License	MIT

Summary

Fixes a TypeError in AssistantMessageNormalizer::normalize() that occurs when $data->toolCalls is null in the Anthropic bridge.

Problem

The current implementation calls array_map() on potentially null toolCalls:

'content' => array_map(static function (ToolCall $toolCall) {
    // ...
}, $data->toolCalls ?? []),

[chr-hertel]

Hi @Muneer-Shafi and welcome to the repository! :)
Thanks for working on that fix - can you please bring in a test case to prove error and fix?

[Muneer-Shafi]

Hi @Muneer-Shafi and welcome to the repository! :) Thanks for working on that fix - can you please bring in a test case to prove error and fix?

@chr-hertel i have updated test for Claude AssistantMessageNormalizerTest

[chr-hertel]

Thank you @Muneer-Shafi.