bug(sona): getStats().trajectoriesRecorded always returns 0

[dmoellenbeck]

Describe the bug

SonaEngine.getStats() reports trajectoriesRecorded: 0 even after successfully recording and processing trajectories via beginTrajectory → addTrajectoryStep → endTrajectory.

Environment

• @ruvector/sona: v0.1.5
• Node.js: v22.x (NAPI bindings)
• Platform: macOS Apple Silicon (darwin-arm64)

To Reproduce

const { SonaEngine } = require('@ruvector/sona');
const engine = new SonaEngine(256);

// Record 120 trajectories
for (let i = 0; i < 120; i++) {
  const tid = engine.beginTrajectory(new Array(256).fill(Math.random()));
  engine.addTrajectoryStep(tid, new Array(256).fill(0.5), new Array(256).fill(0.1), 0.8);
  engine.endTrajectory(tid, 0.9);
}

console.log(engine.getStats());
// CoordinatorStats { trajectories_buffered: 120, ... }
// BUT: trajectoriesRecorded is always 0 in the JSON stats

const result = engine.forceLearn();
console.log(result);
// "Forced learning: 120 trajectories -> 0 patterns, status: completed"
// ^^^ forceLearn WORKS — confirms trajectories are buffered and processed

console.log(engine.getStats());
// trajectories_buffered: 0 (cleared after forceLearn)
// trajectoriesRecorded: still 0

Expected behavior

getStats() should report the actual number of trajectories recorded (120 in this case), matching trajectories_buffered before processing.

Actual behavior

trajectoriesRecorded is always 0, even though:

• trajectories_buffered correctly shows 120
• forceLearn() successfully processes them (status: completed)

The counter appears to never be incremented in the Rust code when endTrajectory is called.

Additional context

Using SONA via ruvector MCP server (v0.2.16) for a coaching application. The IntelligenceEngine wrapper also shows 0 because it reads from getStats(). This makes it impossible to monitor SONA learning progress from the outside.