Issue#38 Add targeted MySQL↔BigQuery CI coverage

[kantselovich]

Fixes #38

[orca-security-us]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Infrastructure as Code	0   0   0   0	View in Orca
Passed	SAST	0   0   0   0	View in Orca
Passed	Secrets	0   0   0   0	View in Orca
Passed	Vulnerabilities	0   0   0   0	View in Orca

[gemini-code-assist]

Code Review

This pull request updates the BigQuery database connector to automatically configure a default dataset in the query job configuration and adds BigQuery-related environment variables to the development environment file. Feedback includes a recommendation to safely handle the query job configuration to avoid potential TypeErrors when overlapping with keyword arguments, and a suggestion to use placeholders in the environment file instead of hardcoded local paths and project IDs to improve portability.

[orca-security-us]

Orca Security Scan Summary

Status	Check	Issues by priority
Passed	Infrastructure as Code	0   0   0   0	View in Orca
Passed	SAST	0   0   0   0	View in Orca
Passed	Secrets	0   0   0   0	View in Orca
Warning	Vulnerabilities	1   0   0   0	View in Orca

☢️ The following Vulnerabilities (CVEs) have been detected

	PACKAGE	FILE	CVE ID	INSTALLED VERSION	FIXED VERSION
	setuptools	./uv.lock	CVE-2025-47273	70.3.0	78.1.1	View in code

Note: The scan should have failed if no policies were configured in warn-only mode.

[kantselovich]

+1 @ramyamasani Nice work here.

But I cannot approve my own PR, however you can add + 1 :-)