Add user selection to ssh key deployment

[saeedvaziry]

closes #924

[Copilot]

Pull Request Overview

This pull request adds the ability to deploy SSH keys to specific users on servers, rather than only to the default SSH user. This allows for more granular control when managing SSH access across different system users.

• Added user selection when deploying SSH keys through both web UI and API
• Updated SSH key deployment and deletion scripts to work with user-specific authorized_keys files
• Added validation to ensure keys are only deployed to valid server users

Reviewed Changes

Copilot reviewed 17 out of 18 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tests/Feature/ServerKeysTest.php	Added test coverage for deploying keys to specific users and validating invalid users
tests/Feature/API/ServerSshKeysTest.php	Added API test coverage for user-specific key deployment and validation
resources/views/ssh/os/deploy-ssh-key.blade.php	Updated deployment script to work with user-specific SSH directories without sudo
resources/views/ssh/os/delete-ssh-key.blade.php	Improved deletion script to safely remove keys from user-specific authorized_keys files
resources/js/types/ssh-key.d.ts	Added deployment_user field to TypeScript interface
resources/js/pages/server-ssh-keys/components/deploy-key.tsx	Added user selection dropdown to deployment form
resources/js/pages/server-ssh-keys/components/columns.tsx	Added "Deployed to User" column to display which user has the key
public/api-docs/openapi/ssh-keys.yaml	Added comprehensive API documentation for SSH key endpoints
public/api-docs/openapi/schemas/SshKey.yaml	Updated schema to include deployment_user field
database/migrations/2025_11_13_185811_add_user_to_server_ssh_keys_table.php	Added user column to track which user each key is deployed to
app/SSH/OS/OS.php	Updated deploySSHKey and deleteSSHKey methods to accept user parameter
app/Models/SshKey.php	Added user to pivot attributes
app/Models/Server.php	Added user to pivot attributes
app/Http/Resources/SshKeyResource.php	Added deployment_user to API response
app/Http/Controllers/ServerSshKeyController.php	Updated to pass user input to deployment action
app/Http/Controllers/API/ServerSSHKeyController.php	Updated to pass user input to deployment action
app/Actions/SshKey/DeployKeyToServer.php	Added validation and handling for user parameter with backward compatibility
app/Actions/SshKey/DeleteKeyFromServer.php	Updated to retrieve and use the correct user when deleting keys

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