docs(W4): document contract — stamp kind and status on 104 live docs (#1350)

Co-authored-by: veronica <[email protected]>

docs/fleet/operations/backup-restore.md

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 # Fleet Configuration Backup and Restore Boundary
 
 **Issue:** #758 · **Card:** FCM-M4-001

docs/fleet/operations/env-quarantine.md

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 # Environment Quarantine Operations
 
 Legacy <name>.env is input evidence, never current launch authority. Projection preparation classifies it deterministically:

docs/fleet/operations/reconcile-and-recover.md

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 # Reconcile and Recover a Local Fleet
 
 ## Safe sequence

docs/fleet/operations/systemd-tmux-troubleshooting.md

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 # Systemd and tmux Troubleshooting
 
 Start with read-only mosaic fleet status, `doctor`, and `verify`. Do not manually adopt, rename, terminate, or recreate sessions while ownership is ambiguous.

docs/fleet/operations/upgrade-assets.md

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 # Upgrade and Installed-Asset Drift
 
 Fleet source assets and installed assets can differ after an update, but FCM-M5-001 does not add a trustworthy source-versus-installed revision detector or refresh command. Do not infer freshness from checkout presence, timestamps, generated environment files, running sessions, or a ready migration preview.