chore(conductor): Add new track 'Event-Driven API Metrics Updates'

conductor/tracks/event_driven_metrics_20260223/plan.md

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+# Implementation Plan: Event-Driven API Metrics Updates
+
+## Phase 1: Event Infrastructure & Test Setup
+Define the event mechanism and create baseline tests to ensure we don't break data accuracy.
+
+- [ ] Task: Create `tests/test_api_events.py` to verify the new event emission logic in isolation.
+- [ ] Task: Implement a simple `EventEmitter` or `Signal` class (if not already present) to handle decoupled communication.
+- [ ] Task: Instrument `ai_client.py` with the event system, adding placeholders for the key lifecycle events.
+- [ ] Task: Conductor - User Manual Verification 'Phase 1: Event Infrastructure & Test Setup' (Protocol in workflow.md)
+
+## Phase 2: Client Instrumentation (API Lifecycle)
+Update the AI client to emit events during actual API interactions.
+
+- [ ] Task: Implement event emission for Gemini and Anthropic request/response cycles in `ai_client.py`.
+- [ ] Task: Implement event emission for tool/function calls and stream processing.
+- [ ] Task: Verify via tests that events carry the correct payload (token counts, session metadata).
+- [ ] Task: Conductor - User Manual Verification 'Phase 2: Client Instrumentation (API Lifecycle)' (Protocol in workflow.md)
+
+## Phase 3: GUI Integration & Decoupling
+Connect the UI to the event system and remove polling logic.
+
+- [ ] Task: Update `gui.py` to subscribe to API events and trigger metrics UI refreshes only upon event receipt.
+- [ ] Task: Audit the `gui.py` render loop and remove all per-frame metrics calculations or display updates.
+- [ ] Task: Verify that UI performance improves (reduced CPU/frame time) while metrics remain accurate.
+- [ ] Task: Conductor - User Manual Verification 'Phase 3: GUI Integration & Decoupling' (Protocol in workflow.md)