Attribute chat edits to resolved Auto tiers

[Shivi Purwaha (spurwaha)]

Adds typed, non-rendering progress and per-edit-batch snapshots so chat edit attribution uses the client-resolved Auto tier, including defaults, overrides, cache hits, and reroutes. Attribution remains tied to the originating request through async queues and restored history. Unknown, failed, older-producer, and non-Auto cases remain unset. No visible UI changes.

Adds optional autoTier detail metadata to prevent mixed-tier aggregation while preserving existing model IDs, source predicates, and pre-tier top-10/30 source coverage. Each selected source expands to at most five known or unknown tier rows.

Validation: 261 focused core tests and 76 extension routing tests passed, plus core and extension typechecks, API declaration checks, and changed-file ESLint. The full-diff comment pass found no changes, and upstream main matches the base.

[Copilot]

Copilot review overview

🟡 Changes recommended

Quota fallback can leave stale Auto-tier metadata and misattribute utility-model edits.

Get a fresh assessment by requesting another Copilot review.

Review effort: Balanced
Findings: 1

Open (1)

• Clear Auto attribution when quota fallback selects a base model · New

What changed in this PR

Adds invisible Auto-tier metadata so chat edits are attributed to the resolved routing tier across queues, reroutes, caching, and persistence.

Changes:

• Adds and transports the proposed Auto-tier progress part.
• Snapshots tier metadata per edit batch.
• Subdivides edit telemetry by validated tier while preserving source caps.

File	Description
src/​vscode-dts/​vscode.proposed.chatParticipantAdditions.d.ts	Declares the proposed tier progress part.
src/​vs/​workbench/​contrib/​editTelemetry/​test/​browser/​editSourceTrackingImpl.test.ts	Tests tier aggregation and caps.
src/​vs/​workbench/​contrib/​editTelemetry/​browser/​telemetry/​editSourceTrackingImpl.ts	Groups and reports tier telemetry.
src/​vs/​workbench/​contrib/​editTelemetry/​browser/​telemetry/​arcTelemetrySender.ts	Excludes tiers from cleaned ARC keys.
src/​vs/​workbench/​contrib/​chat/​test/​common/​model/​chatModel.test.ts	Tests tier snapshots and persistence.
src/​vs/​workbench/​contrib/​chat/​test/​browser/​chatEditing/​chatEditingService.test.ts	Tests queued edit attribution.
src/​vs/​workbench/​contrib/​chat/​common/​model/​chatSessionOperationLog.ts	Persists tier and notebook metadata changes.
src/​vs/​workbench/​contrib/​chat/​common/​model/​chatModel.ts	Stores tiers and per-batch snapshots.
src/​vs/​workbench/​contrib/​chat/​common/​editing/​chatEditingService.ts	Extends streaming edit contracts.
src/​vs/​workbench/​contrib/​chat/​common/​chatService/​chatService.ts	Defines the internal tier progress type.
src/​vs/​workbench/​contrib/​chat/​browser/​chatEditing/​notebook/​chatEditingNotebookCellEntry.ts	Forwards cell edit metadata.
src/​vs/​workbench/​contrib/​chat/​browser/​chatEditing/​chatEditingTextModelChangeService.ts	Creates tier-aware edit sources.
src/​vs/​workbench/​contrib/​chat/​browser/​chatEditing/​chatEditingSession.ts	Preserves metadata through edit queues.
src/​vs/​workbench/​contrib/​chat/​browser/​chatEditing/​chatEditingServiceImpl.ts	Matches snapshots to edit batches.
src/​vs/​workbench/​contrib/​chat/​browser/​chatEditing/​chatEditingModifiedNotebookEntry.ts	Propagates notebook metadata.
src/​vs/​workbench/​contrib/​chat/​browser/​chatEditing/​chatEditingModifiedFileEntry.ts	Extends the edit-entry API.
src/​vs/​workbench/​contrib/​chat/​browser/​chatEditing/​chatEditingModifiedDocumentEntry.ts	Propagates document metadata.
src/​vs/​workbench/​api/​test/​common/​extHostTypeConverters.test.ts	Tests tier conversion.
src/​vs/​workbench/​api/​test/​common/​extHostChatAgents2.test.ts	Tests progress stream ordering.
src/​vs/​workbench/​api/​common/​extHostTypes.ts	Implements the extension-host part.
src/​vs/​workbench/​api/​common/​extHostTypeConverters.ts	Converts tier progress DTOs.
src/​vs/​workbench/​api/​common/​extHostChatAgents2.ts	Accepts and reports tier parts.
src/​vs/​workbench/​api/​common/​extHost.api.impl.ts	Exposes the proposed API class.
src/​vs/​platform/​telemetry/​common/​editTelemetry.ts	Adds classified tier telemetry.
src/​vs/​editor/​test/​common/​model/​textModelEditSource.test.ts	Tests tier validation and keys.
src/​vs/​editor/​common/​textModelEditSource.ts	Adds validated tier source metadata.
extensions/​copilot/​src/​vscodeTypes.ts	Re-exports the proposed part.
extensions/​copilot/​src/​util/​common/​test/​shims/​vscodeTypesShim.ts	Registers the test shim.
extensions/​copilot/​src/​util/​common/​test/​shims/​chatTypes.ts	Implements the shimmed part.
extensions/​copilot/​src/​platform/​endpoint/​node/​test/​automodeService.spec.ts	Tests tier resolution scenarios.
extensions/​copilot/​src/​platform/​endpoint/​node/​automodeService.ts	Emits request-scoped resolved tiers.
extensions/​copilot/​src/​extension/​test/​node/​services.ts	Updates the test service stub.
extensions/​copilot/​src/​extension/​conversation/​vscode-node/​chatParticipants.ts	Connects routing events to response streams.

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