/**
 * RED Phase Tests for exactOptionalPropertyTypes Violations
 *
 * This file documents TypeScript violations found when `exactOptionalPropertyTypes: true`
 * is enabled in tsconfig.base.json. This setting enforces proper distinction between:
 *
 * - `{ prop?: T }` - property can be MISSING or have type T (cannot be explicitly undefined)
 * - `{ prop?: T | undefined }` - property can be MISSING, have type T, or be explicitly undefined
 *
 * The violations occur when code explicitly assigns `undefined` to optional properties
 * that don't have `| undefined` in their type definition.
 *
 * ## Violation Summary (61 exactOptionalPropertyTypes errors across 18 files):
 *
 * ### By Error Code:
 * - TS2375: Object literal type not assignable (return statements, variable assignments)
 * - TS2379: Argument type not assignable (function call arguments)
 * - TS2412: Direct assignment of undefined to optional property
 *
 * ### By File (files with exactOptionalPropertyTypes violations):
 *
 * 1. src/cdc/batch-processor.ts (2 errors)
 *    - Lines 397, 416: newRow/oldRow handling
 *
 * 2. src/cdc/circuit-breaker.ts (1 error)
 *    - Line 290: CircuitBreakerStats with lastFailure/lastSuccess
 *
 * 3. src/cdc/debug-utils.ts (2 errors)
 *    - Lines 203, 499: EventLogEntry and SubscriptionSnapshot
 *
 * 4. src/cdc/errors.ts (11 errors)
 *    - Lines 85-89, 200-201, 353, 377, 384, 391, 400: subscriptionId, suggestion, context
 *
 * 5. src/cdc/health-monitor.ts (6 errors)
 *    - Lines 176, 268, 331, 418, 419: checkTimer, lastEventAt, lastFailureAt
 *
 * 6. src/cdc/logger.ts (5 errors)
 *    - Lines 258, 333, 337, 341, 345: LogEntry subscriptionId/context/error
 *
 * 7. src/cdc/react-hooks.ts (3 errors)
 *    - Lines 195, 409, 548: events/filter/resumeFrom/healthStatus
 *
 * 8. src/cdc/state-machine.ts (2 errors)
 *    - Lines 306, 313: context in error options and StateTransition
 *
 * 9. src/cdc/stream-manager.ts (1 error)
 *    - Line 880: RowChange with newRow/oldRow/changedColumns
 *
 * 10. src/cli/commands/migrate-dashboard.ts (2 errors)
 *     - Lines 339, 356: limit parameter
 *
 * 11. src/client.ts (1 error)
 *     - Line 620: RpcTransportConfig with apiKey/WebSocket/connectTimeout
 *
 * 12. src/middleware.ts (1 error)
 *     - Line 767: QueryTrace with parentSpanId/error
 *
 * 13. src/migrations/progress-api.ts (1 error)
 *     - Line 181: string | undefined assignment
 *
 * 14. src/pool.ts (1 error)
 *     - Line 195: Date assignment
 *
 * 15. src/retention.ts (7 errors)
 *     - Lines 630, 1043, 1091, 1507, 1553, 1592, 1612: RetentionPolicy, LegalHold, etc.
 *
 * 16. src/transport/cdc-sse.ts (4 errors)
 *     - Lines 549, 550, 552, 554: Row newRow/oldRow
 *
 * 17. src/transport/cdc-ws.ts (3 errors)
 *     - Lines 180, 539, 690: config and CDCChangeEvent
 *
 * 18. src/transports/cdc-sse.ts (4 errors)
 *     - Lines 384, 385, 387, 389: Row newRow/oldRow
 *
 * ## Fix Patterns for GREEN Phase:
 *
 * Pattern 1: Add `| undefined` to interface property type
 *   BEFORE: `prop?: T`
 *   AFTER:  `prop?: T | undefined`
 *
 * Pattern 2: Omit property when value is undefined (spread with conditional)
 *   BEFORE: `{ prop: maybeUndefined }`
 *   AFTER:  `{ ...(maybeUndefined !== undefined && { prop: maybeUndefined }) }`
 *
 * Pattern 3: Type narrow before assignment
 *   BEFORE: `obj.prop = value` (where value may be undefined)
 *   AFTER:  `if (value !== undefined) { obj.prop = value }`
 *
 * @see https://www.typescriptlang.org/tsconfig#exactOptionalPropertyTypes
 */
export {};
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