🧹 Refactor Tailscale service management to reduce duplication

[mgabrielramos]

Refactored src/infra/tailscale.ts to reduce code duplication in Tailscale service management functions.

Changes:

• Created a helper function runTailscaleServiceCommand that handles the common logic for executing tailscale serve and tailscale funnel commands with sudo fallback.
• Updated enableTailscaleServe, disableTailscaleServe, enableTailscaleFunnel, and disableTailscaleFunnel to use the helper function.

Verification:

• Verified that existing tests in src/infra/tailscale.test.ts pass using bun test.
• No functional changes were made, ensuring existing behavior is preserved.

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PR created automatically by Jules for task 16459203873218403898 started by @mgabrielramos

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