Initial commit: Laravel OSINT platform

Multi-user OSINT investigation tool with owner-controlled per-user and
per-group access grants. Includes Sherlock, theHarvester, crt.sh, WHOIS,
and ip-api.com collectors wired through a pluggable Runner/queue pipeline,
investigation search, and printable/CSV/JSON reporting.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/Models/Target.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Attributes\Fillable;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+#[Fillable(['investigation_id', 'created_by', 'type', 'value', 'notes'])]
+class Target extends Model
+{
+    public const TYPES = ['person', 'domain', 'email', 'username', 'ip', 'org'];
+
+    /**
+     * Format validation for the `value` column, per target type.
+     * Kept in sync with runners that assume a given shape (e.g.
+     * SherlockRunner's username charset check).
+     *
+     * @return array<int, string>
+     */
+    public static function valueRulesFor(string $type): array
+    {
+        return match ($type) {
+            'email' => ['required', 'string', 'email', 'max:255'],
+            'domain' => ['required', 'string', 'max:255', 'regex:/^([a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$/'],
+            'ip' => ['required', 'ip'],
+            'username' => ['required', 'string', 'max:255', 'regex:/^[a-zA-Z0-9._-]+$/'],
+            default => ['required', 'string', 'max:255'],
+        };
+    }
+
+    public function investigation(): BelongsTo
+    {
+        return $this->belongsTo(Investigation::class);
+    }
+
+    public function creator(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'created_by');
+    }
+
+    public function findings(): HasMany
+    {
+        return $this->hasMany(Finding::class);
+    }
+}