improve documented scope return values (#1025)

TC review suggests that DETACHED and INACTIVE responses need clarification

Author: brettmc

Context.php

@@ -53,7 +53,7 @@ public static function storage(): ContextStorageInterface
     /**
      * @param ContextInterface|false|null $context
      *
-     * @internal
+     * @internal OpenTelemetry
      */
     public static function resolve($context, ?ContextStorageInterface $contextStorage = null): ContextInterface
     {

ScopeInterface.php

@@ -8,11 +8,11 @@
 
 interface ScopeInterface
 {
-    /** Already detached. */
+    /** The associated context was already detached. */
     public const DETACHED = 1 << (PHP_INT_SIZE << 3) - 1;
-    /** Execution context inactive. */
+    /** The associated context is not in the active execution context. */
     public const INACTIVE = 1 << (PHP_INT_SIZE << 3) - 2;
-    /** Not current context. */
+    /** The associated context is not the active context. */
     public const MISMATCH = 1 << (PHP_INT_SIZE << 3) - 3;
 
     /**