Added some dianostics

[djthorpe]

This PR adds diagnostic output to the pgmanager server by introducing a new function to get the executable name and updating the server startup messages. However, there is a critical issue with dependency versions containing future dates.

• Added ExecName() function to retrieve the executable name
• Updated server startup output to display executable name, version, and full listening address

[Copilot]

Pull request overview

This PR adds diagnostic output to the pgmanager server by introducing a new function to get the executable name and updating the server startup messages. However, there is a critical issue with dependency versions containing future dates.

• Added ExecName() function to retrieve the executable name
• Updated server startup output to display executable name, version, and full listening address
• Updated dependencies including grpc-gateway and related Google genproto packages

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
pkg/version/version.go	Added ExecName() function to return the base name of the executable
cmd/pgmanager/server.go	Updated diagnostic output to show executable name and version, improved listening address message
go.mod	Added gRPC-related dependencies and removed unused OpenTelemetry exports

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