fix(ingest): spark-lineage: Adding additional debug logs to spark lineage

[treff7es]

Gracefully handling null parameters in sql start event

Checklist

• The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• Links to related issues (if applicable)
• Tests for the changes have been added/updated (if applicable)
• Docs related to the changes have been added/updated (if applicable). If a new feature has been added a Usage Guide has been added for the same.
• For any breaking change/potential downtime/deprecation/big changes an entry has been made in Updating DataHub

[github-actions]

Unit Test Results (build & test)

508 tests  ±0   508 ✔️ ±0   8m 15s ⏱️ -48s
118 suites ±0       0 💤 ±0 
118 files   ±0       0 ❌ ±0 

Results for commit 76cc4fc. ± Comparison against base commit b477047.

[shirshanka]

LGTM