Updates Temporal Server to 1.29.5

[liam-lowe]

What was changed

Updates Temporal Server to 1.29.5.

There was a breaking change in serialization interface: the SerializeEvents method previously required two arguments - and now only requires one. The second argument for EncodingType has been removed. As per the removal PR - "The parameter is superfluous since it always set to enumspb.ENCODING_TYPE_PROTO3. There are no plans to move to a different encoding scheme.".

Why?

To ensure S2S-Proxy is up-to-date with Temporal Server versions.

Concerns

This is a breaking contract change in upstream SDK:

// old:
blob, err := s.SerializeEvents(events, enums.ENCODING_TYPE_PROTO3)
// new:
blob, err := s.SerializeEvents(events)

I believe this isn't a concern for S2S-Proxy - as we aren't impacting API surface area - it only affects internal persistence and transport interface for serialization. The serialized blob output remains the same.

Testing

• This change is old initial commit (Jun 20, 2025) - recent testing has been done using the previous version of temporal proxy (with server 1.27.4) against live temporal server.
• I also ran the compatibility test suite