run start --dry-run doesn't validate job ID

[tiulpin]

CLI Version: dev
TeamCity Server Version: 2026.2
Operating System: macOS

What happened?

tc run start nonexistent_build --dry-run succeeds with exit code 0 without checking if the job exists:

$ tc run start nonexistent_build --dry-run
[dry-run] Would trigger run for nonexistent_build
$ echo $?
0

Expected behavior

--dry-run should validate the job ID against the server and report an error if it doesn't exist. Users expect dry-run to verify what would happen, not just echo input back.

Steps to reproduce

1. Run tc run start any_nonexistent_id --dry-run
2. Observe success message and exit code 0