refactor: Framework code cleanup and improvements

- DI dependency graph improvements
- Database connection updates
- HTTP middleware chain optimizations
- Routing middleware cleanup

src/Framework/ErrorAggregation/Storage/DatabaseErrorStorage.php

@@ -139,7 +139,7 @@ final readonly class DatabaseErrorStorage implements ErrorStorageInterface
     public function getPatternById(string $patternId): ?ErrorPattern
     {
         $sql = "SELECT * FROM error_patterns WHERE id = ?";
-        $result = $this->connection->query($sql, [$patternId]);
+        $result = $this->getConnection()->query($sql, [$patternId]);
 
         if (empty($result)) {
             return null;
@@ -183,7 +183,7 @@ final readonly class DatabaseErrorStorage implements ErrorStorageInterface
             LIMIT ?
         ";
 
-        $results = $this->connection->query($sql, [$service, $limit]);
+        $results = $this->getConnection()->query($sql, [$service, $limit]);
 
         return array_map([$this, 'hydratePattern'], $results);
     }