fix(cli): streaming deltas, task ID propagation, cancel recovery, and misc fixes

[cte]

Summary

• Streaming deltas for tool_use events: json-event-emitter now computes structured deltas for ask messages (command, tool, mcp) instead of sending full snapshots, reducing output volume during streaming. Includes a new dedicated test suite.
• Upfront task ID propagation: Task IDs are generated upfront via randomUUID() in stdin-stream and threaded through runTask → createTask → Task constructor. currentTaskId is exposed in ExtensionState immediately, before the task emits its first state update (task is created with startTask: false then started after being added to the stack).
• Post-cancel recovery: After a cancel, stdin-stream now waits (with timeout) for the task to reach a resumable state before processing follow-up messages, preventing race conditions where messages arrive before the cancelled task is rehydrated.
• Telemetry opt-out: ROO_CODE_DISABLE_TELEMETRY=1 env var disables cloud telemetry; backfillMessages also early-returns when telemetry is disabled.
• Custom tools schema fix: Tools without parameters now receive a valid empty JSON Schema object ({ type: "object", properties: {}, required: [], additionalProperties: false }) instead of undefined, fixing validation errors with strict-mode APIs (Anthropic, OpenAI).
• RooProtectedController path fix: Paths outside the working directory (starting with ..) are skipped early to avoid RangeError thrown by the ignore library.
• Abort during retry: Silently handles task abort during exponential backoff retry countdown instead of logging a spurious error.
• Custom tools experiment: Extension host now enables customTools: true in experiments.

Test plan

• Verify CLI streaming mode emits delta-based tool_use events (not full snapshots) for command, tool, and mcp asks
• Verify task ID is available in extension state immediately after task creation
• Verify cancel → follow-up message sequencing doesn't race
• Verify ROO_CODE_DISABLE_TELEMETRY=1 suppresses telemetry
• Verify custom tools without parameters work with strict-mode APIs
• Verify isWriteProtected doesn't throw for paths outside cwd
• Run new test suites: json-event-emitter-streaming.test.ts, RooProtectedController.spec.ts, format-native.spec.ts

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