Update CHANGELOG for release 3.2.3 with features, refactoring, and documentation additions.

Author: Ostico

CHANGELOG.md

@@ -1,5 +1,22 @@
 # CHANGELOG
 
+## 3.2.3
+
+### Features
+
+- Added abstract `json()` method to `AbstractResponse` class, enforcing a consistent JSON response contract across all response implementations.
+- Added `declare(strict_types=1)` to all source files for improved type safety.
+- Resolved all PHPStan static analysis errors across the codebase.
+
+### Refactoring
+
+- Refactored tests and benchmarks with updated namespaces and structural improvements.
+
+### Documentation
+
+- Added routing architecture technical documentation (`docs/routing-architecture.md`).
+- Updated Packagist badge link in `README.md`.
+
 ## 3.2.0
 
 ### Features

src/Klein/AbstractResponse.php

@@ -535,4 +535,14 @@ public function redirect(string $url, int $code = 302): static
 
         return $this;
     }
+
+
+    /**
+     * Converts the given object to a JSON representation.
+     *
+     * @param mixed $object The data to be encoded as JSON.
+     * @param ?string $jsonp_prefix Optional JSONP prefix to wrap the JSON response.
+     * @return static Returns the current instance for method chaining.
+     */
+    abstract public function json(mixed $object, ?string $jsonp_prefix = null): static;
 }