Variable OutlookQuerySchemaConst

Outlook-specific query schema with recursive operators and Outlook features.

Includes Microsoft Graph/Outlook-specific features:

• exactPhrase: Strict exact phrase matching via KQL $search parameter
• categories: Outlook system categories (work, personal, family, travel, important, urgent)
• label: User-created Outlook categories (case-sensitive, discovered via outlook-categories-list)
• importance: Message importance level (high, normal, low)
• kqlQuery: Escape hatch for advanced KQL (Keyword Query Language) syntax

Plus all base fields from baseEmailQueryFields:

• Email addresses: from, to, cc, bcc (support string or field operators)
• Content: subject, body, text
• Flags: hasAttachment, isRead
• Date range: date { $gte, $lt }
• Logical operators: $and, $or, $not (recursive)

Note: Cast through unknown to work around Zod's lazy schema type inference issue with exactOptionalPropertyTypes. The runtime schema is correct; this cast ensures TypeScript sees the strict OutlookQuery type everywhere the schema is used.