agentHost: track todo store telemetry

[amunger]

Classify successful Agent Host SQL access to todos and todo_deps without exposing raw queries. Add toolCallId correlation to generic tool telemetry while keeping the existing local todo-list event unchanged.

[Copilot]

Pull request overview

Adds privacy-safe telemetry for successful Agent Host SQL operations involving todo storage.

Changes:

• Classifies todo SQL operations by access type and target.
• Emits correlated todo-store and generic tool telemetry.
• Adds classification and telemetry integration tests.

Show a summary per file

File	Description
src/vs/platform/telemetry/common/todoStoreTelemetry.ts	Defines the new telemetry event.
src/vs/platform/telemetry/common/languageModelToolTelemetry.ts	Adds tool-call correlation.
src/vs/platform/agentHost/test/node/agentHostToolCallTracker.test.ts	Tests SQL classification.
src/vs/platform/agentHost/test/node/agentHostToolCallTelemetry.test.ts	Tests telemetry emission and filtering.
src/vs/platform/agentHost/node/agentSideEffects.ts	Captures finalized tool input.
src/vs/platform/agentHost/node/agentHostToolCallTracker.ts	Classifies operations and triggers telemetry.
src/vs/platform/agentHost/node/agentHostTelemetryReporter.ts	Emits the new event and correlation ID.

Review details

Comments suppressed due to low confidence (1)

src/vs/platform/agentHost/node/agentHostToolCallTracker.ts:248

• The operation is classified from verbs anywhere in the statement rather than from how the todo tables are used. For example, INSERT INTO archive SELECT * FROM todos is reported as mixed, although todo storage is only read; SELECT * FROM todos WHERE title = 'update' is also reported as mixed. This makes the new telemetry inaccurate. Please classify reads/writes against their actual table references (and ignore literals/comments), using a tokenizer/parser or equivalently structured matching.

	const reads = /\bselect\b/i.test(query);
	const writes = /\b(?:insert|update|delete|replace|create|drop|alter)\b/i.test(query);

• Files reviewed: 7/7 changed files
• Comments generated: 1
• Review effort level: Medium