Validation: add context.Context to validation options

[System-Glitch]

References

Issue(s): none

Description

• Added a context.Context field to the validation.Options and validation.Context structures. If not provided, it defaults to context.Background().
• The built-in validation middleware now uses the request context in the validation options.
  • The DB instance used in the validation options by the built-in validation middleware was already injected with the request context. Custom validators don't need to be updated.
  • Places where manual validation is used may need to be updated. However, those will continue to work exactly like they used to without changing anything.

[coveralls]

Pull Request Test Coverage Report for Build 11181089441

Details

• 6 of 6 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.002%) to 97.459%

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Totals
Change from base Build 11069761312:	0.002%
Covered Lines:	6291
Relevant Lines:	6455

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💛 - Coveralls