fix: clean up Tempo sessions after use

[0xKarl98]

Step closer to OSS-162 ,

Previously, cleanup could fail during revoke preflight and leave the session entry active with local key material still present. This kept the session usable locally after the intended command lifecycle had ended.

Now treat revoking as a cleanup state that clears local session key material while keeping the session metadata available for revoke retries.

Also:

• Marks successful cast wallet session --for runs as revoking before revoke preflight, so local key material is erased even if on-chain revoke must be retried.
• Keeps failed wrapped commands retiring the local session as failed.
• Preserves existing terminal statuses instead of downgrading them during cleanup.
• Adds forge script --session as a convenience alias for --tempo.session.
• Makes the new alias participate in Tempo session detection, including Tempo network selection and the --unlocked conflict check.
• Updates tests for revoking key cleanup and forge script --session parsing/behavior.

[mattsse]

LGTM