add batch query optimization for multiple fields

[ginkelsoft-development]

This feature enables efficient searching across multiple fields in a single database query, significantly improving performance for complex search scenarios.

New Scopes Added:

1. encryptedSearchAny() - OR logic across multiple fields

   • Searches same term in multiple fields
   • Returns models where ANY field matches
   • Example: Client::encryptedSearchAny(['first_names', 'last_names'], 'John', 'exact')

2. encryptedSearchAll() - AND logic with field-specific terms

   • Searches different terms in different fields
   • Returns models where ALL fields match their respective terms
   • Example: Client::encryptedSearchAll(['first_names' => 'John', 'last_names' => 'Doe'], 'exact')

Benefits:

• Single database query instead of multiple individual queries
• Reduced database round-trips
• Lower memory footprint
• Better performance at scale
• Supports both exact and prefix search types
• Works with both database and Elasticsearch backends

Test Coverage:

• Added 13 comprehensive tests (BatchQueryTest.php)
• Tests cover OR/AND logic, edge cases, empty inputs
• Performance comparison test validates optimization
• Tests confirm minimum prefix length compliance
• All 89 tests passing (161 assertions)

This addresses performance optimization requirement #1: batch queries for multiple fields in complex search scenarios.