Proto commits in LangStream/langstream

These 7 commits are when the Protocol Buffers files have changed:

Commit:b376906
Author:Christophe Bornet
Committer:GitHub

Add support for schemas in python topic producer (#734)

The documentation is generated from this commit.

Commit:b16e58d
Author:Christophe Bornet
Committer:GitHub

Add gRPC topic producer endpoint - Java side (#693) * Add gRPC topic producer endpoint - Java side * Changes following review

Commit:407ac86
Author:Christophe Bornet
Committer:GitHub

Add Java gRPC Sink (#466)

Commit:118260d
Author:Christophe Bornet
Committer:GitHub

Add permanent failure to Python gRPC Source (#461)

Commit:e9d56bc
Author:Christophe Bornet
Committer:GitHub

Add Python gRPC Source (#449)

Commit:e654304
Author:Christophe Bornet
Committer:GitHub

Add Python processor grpc server (#440)

Commit:aa23a06
Author:Christophe Bornet
Committer:GitHub

Add gRPC processor agent (#406) * Add gRPC processor agent * Fail the JVM in case of error from the remote server * Add a GrpcAgentsProvider in k8s runtime * Rename to experimental-python-processor * Remove grpc agent from runtime deps * By default, don't crash in AgentContext's criticalFailure method