Collect and address warnings reported at compile and runtime time as issues

[ossdhaval]

Collect-triage-address all warnings we currently may have.
These warnings may be getting reported in logs at different stages:

• Build
• Deploy
• Runtime

To be maximally strict with warnings, we need to ensure that we are using appropriate flags so that warnings are not suppressed. This also aligns with CII best practices.

Benefit: This will improve overall stability of software

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Due: 30th June 2021