Make snapshot_version_format test robust to version changes

[daniloaguiarbr]

Context

tests/snapshot_tests.rs::snapshot_version_format currently asserts the exact version string output by ssh-cli --version. The snapshot file tests/snapshots/snapshot_tests__version_format.snap must be manually updated on every release bump.

During v0.2.1 release (pin for elliptic-curve), this test failed because the snapshot expected ssh-cli 0.1.0 (HASH) but build produced ssh-cli 0.2.1 (HASH).

Proposal

Make the test redact the version string in addition to the hash:

// Current (line 62-70 of tests/snapshot_tests.rs)
let redacted = if let Some(start) = stdout.find('(') {
    if let Some(end) = stdout.find(')') {
        format!("{}(HASH){}", &stdout[..start], &stdout[end + 1..])
    } else {
        stdout
    }
} else {
    stdout
};

// Proposed: redact version too
// Regex: `ssh-cli <version> (<hash>)` -> `ssh-cli VERSION (HASH)`

Use regex or simple parse to replace the version number with VERSION placeholder. The snapshot would become stable across releases: ssh-cli VERSION (HASH).

Benefits

• CI failures on version bump are eliminated.
• Test focuses on the FORMAT of --version output, not the literal version.
• Snapshot file becomes immutable between releases.

Priority

Low (quality-of-life). Current workaround: manually update snapshot on each release.