Deprecate non-tag based methods

Author: timkelty

src/HeaderEnum.php

@@ -6,7 +6,6 @@ enum HeaderEnum: string
 {
     case CACHE_TAG = 'Cache-Tag';
     case CACHE_PURGE_TAG = 'Cache-Purge-Tag';
-    case CACHE_PURGE_PREFIX = 'Cache-Purge-Prefix';
     case CACHE_CONTROL = 'Cache-Control';
     case CDN_CACHE_CONTROL = 'CDN-Cache-Control';
     case SURROGATE_CONTROL = 'Surrogate-Control';
@@ -15,6 +14,11 @@ enum HeaderEnum: string
     case REQUEST_TYPE = 'Request-Type';
     case SET_COOKIE = 'Set-Cookie';
 
+    /**
+     * @deprecated Use tag-based purging.
+     */
+    case CACHE_PURGE_PREFIX = 'Cache-Purge-Prefix';
+
     public function matches(string $name): bool
     {
         return strcasecmp($this->value, $name) === 0;

src/StaticCache.php

@@ -292,6 +292,9 @@ public function purgeTags(string|StaticCacheTag ...$tags): void
         ]);
     }
 
+    /**
+     * @deprecated Use tag-based purging.
+     */
     public function purgeUrlPrefixes(string ...$urlPrefixes): void
     {
         $urlPrefixes = Collection::make($urlPrefixes)->filter()->unique();