Expand validation coverage and input normalization

[ash1shkumar]

Description

This PR enhances validation reliability across task, message, and feed workflows by expanding validation coverage, normalizing incoming inputs, and introducing additional defensive checks. These changes improve handling of malformed requests while preserving existing application behavior.

Fixes #365

Changes Made

• Added centralized input normalization helpers.
• Introduced validation attempt and failure tracking metrics.
• Added defensive request payload validation checks.
• Improved validation coverage for task creation and updates.
• Enhanced username validation using normalized input handling.
• Added validation monitoring for malformed requests.
• Improved consistency of validation error generation.
• Added input normalization metrics for diagnostics and monitoring.
• Introduced configurable validation limits for titles, descriptions, and usernames.
• Strengthened validation pipeline against edge-case inputs such as null, undefined, and whitespace-only values.

Testing

• Verified valid task submissions continue to pass validation.
• Tested malformed request payload handling.
• Verified title, description, and username length constraints.
• Confirmed validation metrics update correctly during success and failure scenarios.
• Tested whitespace-only and empty input cases.
• Ensured existing workflows remain unaffected.

Expected Labels

level3, NSoC'26

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Project	Deployment	Actions	Updated (UTC)
flow-forge	Ready	Preview, Comment	Jun 15, 2026 4:35pm