#168: Refactor PostgreSQLHistoryContextController

[erzohrakhan]

closes #168

• Use constructor injection instead of field injection for better testability and maintainability

• Rename 'get' method to 'getById' for clarity

• Rename 'put' method to 'update' for clarity

• Add more descriptive method names

• Changed @PostMapping annotation to @GetMapping and @PutMapping as per Rest principle

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[erzohrakhan]

I have read the Arakoo CLA Document and I hereby sign the CLA
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[erzohrakhan]

I have read the Arakoo CLA Document and I hereby sign the CLA

[erzohrakhan]

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[sandys]

hi @erzohrakhan
thanks for your contribution! ur email address is mismatching with ur github id, so the cla check is failing, but dont worry we will review and merge it if the code passes

[sandys]

@erzohrakhan also would like to invite you to our discord. would love to have u over there - https://discord.gg/g6HTfQWh