feat(scenario): add automatic step boundary logging to run logs

- step start, pass, and fail events logged automatically
- step boundaries visible in run logs without explicit context.log calls
- version bumped from 1.9.0 to 1.9.1

server/src/scenario/scenario-scheduler.service.ts

@@ -345,6 +345,12 @@ export class ScenarioSchedulerService implements OnModuleInit {
     this.logger.log(
       `StepRun #${stepRun.id} (run #${stepRun.runId}, step #${step.id} order=${step.order}) → in_progress`,
     );
+    this.persistLog(
+      stepRun.runId,
+      stepRun.id,
+      "log",
+      `Step ${step.order} started${step.title ? `: ${step.title}` : ""}`,
+    );
 
     try {
       if (!step.execCode) throw new Error("step has no execCode");
@@ -453,6 +459,12 @@ export class ScenarioSchedulerService implements OnModuleInit {
       output !== null && output !== undefined ? JSON.stringify(output) : null;
     await this.runStepRepo.save(stepRun);
     this.logger.log(`StepRun #${stepRun.id} → pass`);
+    this.persistLog(
+      stepRun.runId,
+      stepRun.id,
+      "log",
+      `Step ${(stepRun.scenarioStep as ScenarioStepEntity | undefined)?.order ?? "?"} passed`,
+    );
 
     // Find the next waiting step in this run (next by order)
     const nextStep = await this.runStepRepo.findOne({
@@ -489,6 +501,12 @@ export class ScenarioSchedulerService implements OnModuleInit {
     stepRun.description = description;
     await this.runStepRepo.save(stepRun);
     this.logger.log(`StepRun #${stepRun.id} → fail: ${description}`);
+    this.persistLog(
+      stepRun.runId,
+      stepRun.id,
+      "error",
+      `Step ${(stepRun.scenarioStep as ScenarioStepEntity | undefined)?.order ?? "?"} failed: ${description}`,
+    );
 
     // Cancel all remaining waiting/pending step runs in this run
     await this.runStepRepo