Function deserializeStrict

deserializeStrict(json: string): Try<unknown>
Strict variant of deserialize: returns Failure when the parsed JSON doesn't carry an @functype marker at the top level. Use this at API, queue, or RPC boundaries where the wire format MUST be a functype value and pass-through silence would be a bug.

Implementation note: only the top-level value is checked for the marker. Nested values inside it follow the same lenient pass-through rules as deserialize — a Right containing a plain object still reconstructs fine, you just can't START with a plain object.
Parameters
- json: string
Returns Try<unknown>
Example
```
Serialization.deserializeStrict('{"@functype":"Option","_tag":"Some","value":1}')  // → Success(Some(1))
  Serialization.deserializeStrict('{"_tag":"Some","value":1}')                       // → Failure
  Serialization.deserializeStrict('42')                                              // → Failure
```