chore: major project cleanup and restructuring

## Dokumentation
- Entfernt AGENTS.md (redundant zu CLAUDE.md)
- Verschoben: 3 Dokumentationen von root → docs/
- Gelöscht: 8 historische Migrations-Pläne aus docs/archive/
- Entfernt: misc/ Ordner komplett (43 Dateien)

## Struktur
- Erstellt: database/queries/ für SQL Test-Queries (4 Dateien)
- Erstellt: database/schemas/ für Schema-Dokumentation (17 Dateien)
  - output_keys_mapping/ (8 CSV-Mappings)
  - migration-diagrams/ (4 Diagramme)

## Code-Qualität
- Formatiert: 7 Style-Issues in 74 Dateien mit Laravel Pint
- Gefixed: Migration für PostgreSQL/SQLite Kompatibilität
- Gefixed: 2 fehlgeschlagene Tests (CSRF + Text-Assertion)

## Tests
- Alle 73 Tests bestehen jetzt (100% Success Rate)
- AuthenticationTest: CSRF-Token Fix für Logout-Test
- CompanySearchTest: Text-Assertion aktualisiert

## Ergebnis
- Root ist sauber (nur CLAUDE.md)
- Dokumentation strukturiert in docs/
- Database-Dateien organisiert in database/
- Code entspricht Style-Guide
- Alle Tests bestehen

app/Console/Commands/SyncBackendDataPoolCommand.php

@@ -94,7 +94,7 @@ class SyncBackendDataPoolCommand extends Command
      */
     private function showStats(): int
     {
-        $job = new SyncBackendDataPool();
+        $job = new SyncBackendDataPool;
         $stats = $job->getStats();
 
         info('Backend Data Pool Statistics');
@@ -117,7 +117,7 @@ class SyncBackendDataPoolCommand extends Command
      */
     private function showStatsBefore(): void
     {
-        $job = new SyncBackendDataPool();
+        $job = new SyncBackendDataPool;
         $stats = $job->getStats();
 
         $this->newLine();
@@ -138,7 +138,7 @@ class SyncBackendDataPoolCommand extends Command
      */
     private function showStatsAfter(): void
     {
-        $job = new SyncBackendDataPool();
+        $job = new SyncBackendDataPool;
         $stats = $job->getStats();
 
         $this->newLine();

app/Console/Commands/TransformDataPoolCommand.php

@@ -82,7 +82,7 @@ class TransformDataPoolCommand extends Command
      */
     private function showStats(): int
     {
-        $job = new TransformDataPoolToProduction();
+        $job = new TransformDataPoolToProduction;
         $stats = $job->getStats();
 
         info('Data Pool Transformation Statistics');
@@ -105,7 +105,7 @@ class TransformDataPoolCommand extends Command
      */
     private function showStatsBefore(): void
     {
-        $job = new TransformDataPoolToProduction();
+        $job = new TransformDataPoolToProduction;
         $stats = $job->getStats();
 
         $this->newLine();
@@ -126,7 +126,7 @@ class TransformDataPoolCommand extends Command
      */
     private function showStatsAfter(): void
     {
-        $job = new TransformDataPoolToProduction();
+        $job = new TransformDataPoolToProduction;
         $stats = $job->getStats();
 
         $this->newLine();

app/Jobs/SyncBackendDataPool.php

@@ -29,8 +29,7 @@ class SyncBackendDataPool implements ShouldQueue
     public function __construct(
         public bool $fullSync = true,
         public ?int $batchSize = 1000,
-    ) {
-    }
+    ) {}
 
     /**
      * Execute the job.

app/Models/Backend/Transaction.php

@@ -127,7 +127,7 @@ class Transaction extends Model
     {
         $risk = $this->getRiskAssessment();
 
-        if (!$risk) {
+        if (! $risk) {
             return true; // Keine Risk-Assessment → Review
         }
 

app/Models/Transaction.php

@@ -69,7 +69,7 @@ class Transaction extends Model
             }
         } catch (\Exception $e) {
             // If schema query fails (e.g., during migrations), just use standard casts
-            \Illuminate\Support\Facades\Log::warning('Failed to load JSONB column casts: ' . $e->getMessage());
+            \Illuminate\Support\Facades\Log::warning('Failed to load JSONB column casts: '.$e->getMessage());
         }
 
         // Cache for subsequent calls