Create metadata entities

Start of refactoring package metadata by separating package metadata from the version table to a new metadata table to create immutable packages

Signed-off-by: Tim Goudriaan <tim@codedmonkey.com>

Author: codedmonkey

migrations/Version20260120114538.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace CodedMonkey\Dirigent\Doctrine\Entity;
+
+use Doctrine\DBAL\Types\Types;
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\MappedSuperclass]
+abstract class AbstractMetadataLink
+{
+    #[ORM\Id]
+    #[ORM\Column]
+    #[ORM\GeneratedValue]
+    private ?int $id = null;
+
+    protected Metadata $metadata;
+
+    #[ORM\Column(length: 191)]
+    private string $linkedPackageName;
+
+    #[ORM\Column(type: Types::TEXT)]
+    private string $linkedVersionConstraint;
+
+    public function __construct(Metadata $metadata)
+    {
+        $this->metadata = $metadata;
+    }
+
+    public function getId(): ?int
+    {
+        return $this->id;
+    }
+
+    public function getMetadata(): Metadata
+    {
+        return $this->metadata;
+    }
+
+    public function getLinkedPackageName(): string
+    {
+        return $this->linkedPackageName;
+    }
+
+    public function setLinkedPackageName(string $packageName): void
+    {
+        $this->linkedPackageName = $packageName;
+    }
+
+    public function getLinkedVersionConstraint(): string
+    {
+        return $this->linkedVersionConstraint;
+    }
+
+    public function setLinkedVersionConstraint(string $packageVersion): void
+    {
+        $this->linkedVersionConstraint = $packageVersion;
+    }
+}