fix: pin opentelemetry to prevent LogData issue

[Falven]

Summary

• Pin opentelemetry-api and opentelemetry-sdk to 1.24.0 in simulator requirements.
• Keeps azure-monitor-opentelemetry 1.3.0 compatible (provides LogData import path) and prevents Gunicorn boot failures.

Rationale

• Recent rebuilds picked up newer OpenTelemetry that removed LogData from opentelemetry.sdk._logs, causing startup crash: "cannot import name 'LogData'" during azure.monitor.opentelemetry import.

Testing

• Rebuild simulator image with the pin and verify it starts.
• Local sanity: pip install -r requirements.txt succeeds with pinned versions.

Risks / Rollback

• Low: only adds version pins; no code changes. If issues arise, revert the pin to return to floating OTel versions.