Update Claude usage without rereading the whole conversation (#26967)

* Verify pinned transcript reads and stream Codex usage aggregation

* Resume Claude usage scans with compact token checkpoints

* Harden transcript snapshots and reject incomplete discovery

* Keep Codex race fixtures inside their temporary data home

* Verify pinned transcript rotation with portable file moves

* test: keep Claude usage mock registration in test suites

* Compress saved Claude usage without dropping history

* Keep Claude cache writes bound to their original request

* Register Claude contracts without conflicting with chat contracts

* Assert unchanged Claude sources skip the actual cache writer

.github/workflows/performance-contracts.yml

@@ -27,6 +27,8 @@ on:
       - 'src/renderer/src/components/editor/rich-markdown-lowlight-cache.test.ts'
       - 'src/renderer/src/components/terminal-pane/agent-completion-coordinator-queued-inspection-disposal.test.ts'
       - 'src/renderer/src/lib/pane-manager/pane-terminal-output-scheduler-queue-retention.test.ts'
+      - 'src/main/claude-usage/scanner-incremental-append.test.ts'
+      - 'src/main/claude-usage/store-checkpoint-persistence.test.ts'
 
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   contents: read