feat(contracts): execute Analytics & Insights Wave 5 improvements

[suleimanjem-hash]

Summary

Implements Wave 5 execution tasks for the Analytics & Insights contracts track to improve observability, reporting accuracy, and deployment readiness across the SplitNaira platform.

Changes

• Audited existing Analytics & Insights contract implementations and identified improvement areas.
• Implemented production-grade enhancements for analytics collection and reporting workflows.
• Improved reliability and consistency of analytics-related contract logic.
• Added and updated test coverage for critical analytics scenarios.
• Updated documentation, runbooks, and operational guidance.
• Documented deployment considerations and rollback procedures.

Validation

• All contract tests pass locally and in CI.
• Analytics workflows validated against expected contract behavior.
• Documentation reviewed and updated.
• Deployment and rollback procedures verified.

Operational Impact

• Improves analytics accuracy, visibility, and operational monitoring.
• No breaking changes expected to existing integrations.
• Rollback can be achieved by reverting this PR and redeploying the previous contract version if required.

Implementation Plan

1. Audit Analytics & Insights contract modules.
2. Identify implementation gaps and deployment risks.
3. Implement production-grade analytics improvements.
4. Expand test coverage for analytics workflows.
5. Update documentation and operational runbooks.
6. Validate deployment and rollback readiness.

closes #536

[drips-wave]

@suleimanjem-hash Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

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