Back to Search-quality baseline: deprecation-aware (Phase 1.1, v1.2.0 candidate)

The 30 pairs cover three concept families:

Family | Examples | Count
--- | --- | ---
Foundation value-type vs NS-class | `URL`/`NSURL`, `Data`/`NSData`, `Date`/`NSDate`, `UUID`/`NSUUID`, `URLSession`/`NSURLSession`, `FileManager`/`NSFileManager`, `DateFormatter`/`NSDateFormatter`, `Bundle`/`NSBundle`, `Calendar`/`NSCalendar`, `TimeZone`/`NSTimeZone`, `Locale`/`NSLocale`, `Predicate`/`NSPredicate`, `AttributedString`/`NSAttributedString`, `Measurement`/`NSMeasurement` and others | 27
Swift stdlib vs NS-class | `String`/`NSString`, `Array`/`NSArray`, `Dictionary`/`NSDictionary` | 3

For each pair the query is the modern name as a developer would type it. The expected hits are documented as exact-URI patterns (`apple-docs://foundation/url` vs `apple-docs://foundation/nsurl`, etc.), verified to exist in the v1.2.0 candidate DB before the corpus was finalised.