FIX: DB Entity Schema Loader

[kishorereddy]

Overview

Fix misc issues w/ the kiit.entities Schema loading.
The schema loader loads the schema ( properties ) of a data class that are annotated with Column.
These represent columns in a database table.

1. required: Autoload the required flag on the field/annotation based on field nullability
2. tags : Added tags field on the column Annotation transferred to Field on Model
3. double: Fix the postgres double type mapping from Double to Float8

@Table("user", schema = "unit_tests")
data class UserTypes(

    @Column(length = 100)
    val email: String = "",

    @Column(length = 100)
    val website: String? = null,

    @Column(length = 100, required = true, tags = ["secondary_url"])
    val link: String? = null
...

Ticket(s)

n/a

Links(s)

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Dependencies

n/a

Design

n/a - minor fixes.

Notes

n/a

Pending

n/a

Tests

1. added tests for the required fields
2. more tests will be added in next PR