CLI switches to PKCE authentication

Daytona 0.195.0 strengthens CLI authentication by dropping the embedded client secret in favor of PKCE, with supporting work to make package publishing and testing more reliable.

Fixes

Python SDK: use cache-busting with exponential backoff to handle PyPI publish propagation

Refactor

CLI: remove embedded Auth0 client secret, switch to PKCE

Chores

sync go.sum for v0.194.0

run e2e per language in parallel and split TS runtime tests

remove monorepo-migration cruft, pin CI poetry to 2.3.2, and properly deprecate daytona_sdk

bump opentelemetry stack to 0.219.0/2.8.0 to clear npm audit findings

Go SDK: bump to v0.195.0