[WIP] Implement Email Format Validation

[Merango]

Implement Email Format Validation

Description

Task

Implement Email Format Validation

Acceptance Criteria

• Implement RFC 5322 standard email format validation regex
  Ensure email validation prevents registration with invalid email formats
  Add database-level unique constraint on email field
  Create unit tests covering at least 10 different email format scenarios (valid and invalid)
  Implement case-insensitive email uniqueness check

Summary of Work

This pull request adds email format validation to improve user input validation and ensure data integrity across the application. The implementation will focus on creating a robust email validation mechanism that can be reused across different components and forms.

Changes Made

• Create a utility function for email validation
• Add regex-based email format checking
• Implement validation logic that can be used in multiple forms

Tests

• Verify email validation function handles valid email formats
• Confirm rejection of invalid email formats
• Test edge cases for email validation

Signatures

Staking Key

Gkn3eRUR8rbiHgjXYmXWKgBQnGQWEhJk1n9rvecfFxTm: 21hLSeHT7XNuVeGDCB19PdzkYMPpv6VE7Rdc7BSB9RmUMjESLQXb5A4iobZJBUmfncBMCDe2rTEwiMcdSrQshY3KvJnsPNKc9PwWkoVnTyLUmFDYTHNtysEbu7dPbEFZ6xR8qHzEuhgdW1sbJbL1SaDf1JY1mhgLx94bVGHWYgugKnwVazNDM2c7QyP62DRC7P3Pj4riU5Hf1DN8vERTG7wYt2h1R31PwptwuaBP44RaiLYmt7GaCSsYqoFDiPsRDmgrNvRPQaqtUFX5bTfjXkh9AiVvAtzit1JgzsM9p2YRnq95KNTfhL9HU6ixDhhCHya6o8G1esaFhMbjVvYt2WFUQwZvDf1wMGG2D7DXdVSVQPYqXkJ42XK96VZDbbwuH7b2KP978y8R6SRsFFv7bMXHDFgVnW8k

Public Key

Gq6qy4e4ja8P8iQiawFZvBSYYd62G4X2swAb5rr2axvw: VkfSLHRL1zY58hkYM3fyrptyCrdo9qiEGJruW5g5VT9j66Fic9hmywWweVHcPhEW9NoG18vsYBHdnFvyxdSpzffDByUVdpBAErPPmWZ4tYGM3SNdtMXN78XKuFMSd8kzde2eKQgJXjAXJGfQPLMm9cKVM4JNphTf8VBvo97HHKno6qeqRorTPbW1aWyx3tLLAhRdtFtMRj6YDUFAmtp2UHm1tESFbaMQouBNo2xRLaesj1MKQzefiMz4igQAaKA3BW28sSLfwappT3drtFFih8t9ET1xDZw9XXPiyjwPoXsRqcNa68TFTKzagDvyFKKs9q3GmGxYufCet5sW3w331XMk4GKhytxuaBXkQGv3FYJPbQr9KDUe1PgMWpzRKf1YmNkBE66ZWLXEx6nvQ8EVdFokyRcx5H6