fix: align consistent help menus.

[sadsfae]

Fix: Help Menu Inconsistencies (#152)

• Role-aware help schedule -- admin and SSM users now see only their relevant syntax and options
• schedule --help now lists all accepted keywords (was showing [options] with no details)
• Tab completion split by role -- admin gets admin keywords, SSM gets hardware filter keywords
• --help safety guards on single-argument commands (mark-broken, retire, cloud-create, etc.) to prevent treating "--help" as a hostname
• Fixed misleading docstrings: cloud_list no longer says "(admin only)", connect now documents session/number syntax
• Moved cloud_only from admin-only to all authenticated users
• Added os to mod_cloud tab completion
• Added missing tab completions for 7 commands (cloud-only, move-status, track, session, session-switch, session-close, session-create)

[codecov]

Codecov Report

❌ Patch coverage is 11.90476% with 111 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/quads_client/shell.py	6.72%	111 Missing ⚠️

Flag	Coverage Δ
unittests	78.03% <11.90%> (-2.08%)	⬇️

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Files with missing lines	Coverage Δ
src/quads_client/commands/cloud.py	61.16% <100.00%> (ø)
src/quads_client/commands/host.py	72.89% <100.00%> (ø)
src/quads_client/commands/server.py	77.89% <ø> (ø)
src/quads_client/commands/session.py	96.17% <100.00%> (ø)
src/quads_client/shell.py	37.32% <6.72%> (-5.88%)	⬇️

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