Fix psalm regressions.

src/Config/SDK/Configuration/Environment/Adapter/SymfonyDotenvProvider.php

@@ -17,6 +17,7 @@ use Symfony\Component\Dotenv\Exception\PathException;
 final class SymfonyDotenvProvider implements EnvSourceProvider
 {
     /** @psalm-suppress UndefinedClass */
+    #[\Override]
     public function getEnvSource(): EnvSource
     {
         $installPath = InstalledVersions::getRootPackage()['install_path'];

src/Config/SDK/Configuration/Environment/Adapter/VlucasPhpdotenvProvider.php

@@ -16,6 +16,7 @@ use OpenTelemetry\Config\SDK\Configuration\Environment\EnvSourceProvider;
 final class VlucasPhpdotenvProvider implements EnvSourceProvider
 {
     /** @psalm-suppress UndefinedClass */
+    #[\Override]
     public function getEnvSource(): EnvSource
     {
         $backup = [$_SERVER, $_ENV];

src/Config/SDK/Configuration/Environment/LazyEnvSource.php

@@ -16,6 +16,7 @@ final class LazyEnvSource implements EnvSource
     ) {
     }
 
+    #[\Override]
     public function readRaw(string $name): mixed
     {
         if (!$this->env instanceof EnvSource) {

src/SDK/Common/Configuration/Resolver/EnvironmentResolver.php

@@ -25,6 +25,7 @@ class EnvironmentResolver implements ResolverInterface
         return !Configuration::isEmpty($env);
     }
 
+    #[\Override]
     public function retrieveValue(string $variableName): mixed
     {
         $value = getenv($variableName);

src/SDK/Common/Configuration/Resolver/PhpIniResolver.php

@@ -27,6 +27,7 @@ class PhpIniResolver implements ResolverInterface
         return $value;
     }
 
+    #[\Override]
     public function hasVariable(string $variableName): bool
     {
         $value = $this->accessor->get($variableName);

src/SDK/Common/Configuration/Resolver/SdkConfigurationResolver.php

@@ -36,11 +36,13 @@ class SdkConfigurationResolver implements ResolverInterface
         $this->reader = new EnvSourceReader($envSources);
     }
 
+    #[\Override]
     public function retrieveValue(string $variableName): mixed
     {
         return $this->reader->read($variableName);
     }
 
+    #[\Override]
     public function hasVariable(string $variableName): bool
     {
         return !Configuration::isEmpty($this->reader->read($variableName));

tests/Integration/SDK/Common/Configuration/TestEnvSourceProvider.php

@@ -10,6 +10,7 @@ use OpenTelemetry\Config\SDK\Configuration\Environment\EnvSourceProvider;
 
 class TestEnvSourceProvider implements EnvSourceProvider
 {
+    #[\Override]
     public function getEnvSource(): EnvSource
     {
         return new ArrayEnvSource([