Emit telemetry event for bundle init

[shreyas-goenka]

Changes

This PR adds a telemetry event for the bundle init command, which is emitted on every bundle init command invocation.

This PR also adds a telemetry logger library that allows us to log arbitrary events as long as a corresponding proto exists in the universe.

We add a timeout of 3 seconds for logging the telemetry. Manual benchmarks show that that API requests can take anywhere from 1-3 seconds to finish. We start here with a pragmatic approach and can improve this it of the UX in either of two ways:

1. Add a new command to publish telemetry, and spawn a new process so that the main process can exit without waiting for the telemetry to publish.
2. Maintain a warm TCP connection so that logging the telemetry will only take the round trip time and avoid the overhead associated with

Tests

Integration/unit tests.
They ensure that we do not log PII.

Manually tested there are no (obvious) regressions in the UX and the telemetry event is being sent successfully:

15:05:14 DEBUG POST /telemetry-ext
> {
>   "items": null,
>   "protoLogs": [
>     "{\"frontend_log_event_id\":\"da8a0bc2-9adc-4fc2-89a5-2b0ff802878c\",\"entry\":{\"databricks_cli_log\":{\"... (225 more bytes)"
>   ],
>   "uploadTime": 1735292112
> }
< HTTP/2.0 200 OK
< {
<   "errors": null,
<   "numProtoSuccess": 1,
<   "numSuccess": 0
< } pid=68190 sdk=true
15:05:14 DEBUG Successfully flushed telemetry events pid=68190
15:05:14  INFO completed execution pid=68190 exit_code=0

[shreyas-goenka]

I'll work on a followup PR to try and reduce the additional timeout we wait to capture telemetry requests.

[github-actions]

If integration tests don't run automatically, an authorized user can run them manually by following the instructions below:

Trigger:
go/deco-tests-run/cli

Inputs:

• PR number: 2037
• Commit SHA: aca49b2285a032235b2ef936a3392e447f5546d2

Checks will be approved automatically on success.

[pietern]

If the contents of this PR has fanned out to other PRs, could you link which ones and close this one?