Remove unused daemon startup checks feature

[Copilot]

The daemon's startup check system was not actively used and causing issues. This removes the feature entirely.

Changes

• Removed bouncer module - Deleted the actor that executed shell command checks and blocked daemon startup
• Removed blocking startup behavior - Daemon now proceeds immediately after token registration instead of waiting for checks to pass
• Removed configuration support - ConfigCheck struct and checks field removed from MagicFile; configuration files no longer accept check entries
• Removed message handlers - GetChecks message and associated plumbing removed from magic module

Impact

Before:

// Daemon blocked here until all checks passed
bouncer.ok().await;

// wait for the sweet release of death
shutdown.wait().await;

After:

// this will ensure we have a token
configuration.wait_while_not_registered().await;

// wait for the sweet release of death
shutdown.wait().await;

Daemon startup is now simpler and non-blocking. The police module remains for runtime problem reporting.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Daemon checks are not being used</issue_title>
<issue_description>The daemon currently has a set of startup checks, but these aren't actively being used and in some cases are causing issues. It would be best to remove this feature to simplify things and avoid potential problems.</issue_description>

<agent_instructions>Be carefull, this daemon is the only way to manage our IOT fleet</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Daemon checks are not being used #181

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