Fix SSL verification handling for controller connections

[alexafshar]

Summary

This change fixes SSL certificate verification handling for AppDynamics controller connections when verifySsl is set to false.

Fixes

• honors the configured verifySsl value when creating the aiohttp session
• adds log output showing the configured SSL verification setting and the effective connector state
• keeps threshold version mismatches informational instead of failing the run

Release notes

• Fixed SSL verification for self-signed or misconfigured controller certificates when verifySsl is disabled.
• Threshold version mismatches are now logged as informational only and no longer stop processing.

Related

Fixes #200