SSO sign-in fixed for multi-provider workspaces; review diffs prefer remote branches

CLI v0.6.5

v0.6.5 improves sign-in, local review summaries, and reliability for updates and long-running review sessions.

• SSO sign-in now handles multi-provider workspaces more clearly, preserves the CLI callback through organization selection, and resolves the right workspace organization for enterprise SSO users.
• Local reviews now preserve real .coderabbit.yaml diffs when that file is also loaded as configuration, and the completion summary shows which files CodeRabbit reviewed.
• Review diffs now prefer remote-tracking base branches when local branches are stale, reducing false too-many-files skips.
• Attempts with no reviewable hunks no longer consume review quota.
• Review sessions and self-updates clean up more reliably: the CLI opens review WebSockets only when it is ready to submit, idle connections close after terminal events, and staged update files are removed from temp storage.

See the CLI documentation and CLI Command Reference for more details.