[Bugfix] Mistral tool parser streaming update (vllm-project#19425)

Signed-off-by: avigny <[email protected]>
Signed-off-by: Chauncey <[email protected]>
Signed-off-by: chaunceyjiang <[email protected]>
Co-authored-by: Jeff Cook <[email protected]>
Co-authored-by: sfbemerk <[email protected]>
Co-authored-by: Chauncey <[email protected]>
Co-authored-by: Cyrus Leung <[email protected]>

Author: 5 people

requirements/common.txt

@@ -46,6 +46,7 @@ scipy # Required for phi-4-multimodal-instruct
 ninja # Required for xgrammar, rocm, tpu, xpu
 pybase64 # fast base64 implementation
 cbor2 # Required for cross-language serialization of hashable objects
+ijson # Required for mistral streaming tool parser
 setproctitle # Used to set process names for better debugging and monitoring
 openai-harmony >= 0.0.3  # Required for gpt-oss
 anthropic == 0.71.0