[Bug] Low-priority usage consumes token quota disproportionately fast

Bug Description
The low priority usage despite being priotized lower burned through almost a week of usage in a couple hours.

Environment Info

• Platform: win32
• Terminal: windows-terminal
• Version: 2.1.263
• Feedback ID: b23af326-0fc2-4326-a6c2-59c1d0e57b0e

Errors

[{"error":"TelemetrySafeError: VirtualMessageList: itemKeys/messages length desync (keys=855 messages=854 range=[807,855))\n    at jQt (B:/~BUN/root/chunk-w2v99rzn.js:36:27375)\n    at whe (B:/~BUN/root/chunk-w2v99rzn.js:36:20207)\n    at Br (B:/~BUN/root/chunk-nggm72vf.js:18:20178)\n    at zu (B:/~BUN/root/chunk-nggm72vf.js:18:38344)\n    at Ih (B:/~BUN/root/chunk-nggm72vf.js:18:84425)\n    at Wg (B:/~BUN/root/chunk-nggm72vf.js:18:83425)\n    at ic (B:/~BUN/root/chunk-nggm72vf.js:18:83254)\n    at jh (B:/~BUN/root/chunk-nggm72vf.js:18:79779)\n    at qe (B:/~BUN/root/chunk-nggm72vf.js:18:6261)\n    at ke (B:/~BUN/root/chunk-nggm72vf.js:18:4792)","timestamp":"2026-09-06T15:33:16.428Z"}]