fix: handle undefined case in filtering logic

[manikanta5827]

Fix: Optional Fields Filter

Issue

When querying records with optional fields, records missing those fields were incorrectly included in results.

Example:

// Data
{ "id": "1", "name": "test 1", "optionalField": "A" }
{ "id": "2", "name": "test 2" }  // missing optionalField

// Query: GET /records?optionalField=A
// Before: returned both records
// After: returns only record 1

Solution

Added case 'undefined': return false in the default condition switch statement to properly filter out records with missing fields.

Code Change

file :: src/service.ts line :: 308

case Condition.default: {
  switch (typeof itemValue) {
    case 'number':
      return itemValue === parseInt(paramValue)
    case 'string':
      return itemValue === paramValue
    case 'boolean':
      return itemValue === (paramValue === 'true')
    case 'undefined':
      return false  // ← New line
  }
}

Fixes #1647

[typicode]

Thank you!