Jonathan Nobels a15bc415b9 health, ipn/ipnlocal: add metrics for various client events
updates tailscale/corp#28092

Adds metrics for various client events:
* Enabling an exit node
* Enabling a mullvad exit node
* Enabling a preferred exit node
* Setting WantRunning to true/false
* Requesting a bug report ID
* Profile counts
* Profile deletions
* Captive portal detection

Signed-off-by: Jonathan Nobels <jonathan@tailscale.com>
2025-05-06 15:19:24 -04:00
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