fix: Gitea Traefik routing and connection pool optimization

- Remove middleware reference from Gitea Traefik labels (caused routing issues)
- Optimize Gitea connection pool settings (MAX_IDLE_CONNS=30, authentication_timeout=180s)
- Add explicit service reference in Traefik labels
- Fix intermittent 504 timeouts by improving PostgreSQL connection handling

Fixes Gitea unreachability via git.michaelschiemer.de

src/Framework/Database/Browser/Discovery/TableDiscovery.php

@@ -0,0 +1,107 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Framework\Database\Browser\Discovery;
+
+use App\Framework\Database\Browser\ValueObjects\TableMetadata;
+use App\Framework\Database\ConnectionInterface;
+use App\Framework\Database\ValueObjects\SqlQuery;
+
+final readonly class TableDiscovery
+{
+    public function __construct(
+        private ConnectionInterface $connection
+    ) {
+    }
+
+    /**
+     * Discover all tables in the current database
+     *
+     * @return array<TableMetadata>
+     */
+    public function discoverAllTables(): array
+    {
+        $databaseName = $this->getCurrentDatabase();
+
+        $sql = "
+            SELECT
+                table_name,
+                table_rows,
+                ROUND((data_length + index_length) / 1024 / 1024, 2) as size_mb,
+                engine,
+                table_collation
+            FROM information_schema.tables
+            WHERE table_schema = ?
+            AND table_type = 'BASE TABLE'
+            ORDER BY table_name
+        ";
+
+        $query = SqlQuery::create($sql, [$databaseName]);
+        $result = $this->connection->query($query);
+        $tables = $result->fetchAll();
+
+        $tableMetadata = [];
+        foreach ($tables as $tableData) {
+            $tableMetadata[] = new TableMetadata(
+                name: $tableData['table_name'],
+                rowCount: isset($tableData['table_rows']) ? (int) $tableData['table_rows'] : null,
+                sizeMb: isset($tableData['size_mb']) ? (float) $tableData['size_mb'] : null,
+                engine: $tableData['engine'] ?? null,
+                collation: $tableData['table_collation'] ?? null,
+            );
+        }
+
+        return $tableMetadata;
+    }
+
+    /**
+     * Discover a specific table by name
+     */
+    public function discoverTable(string $tableName): ?TableMetadata
+    {
+        $databaseName = $this->getCurrentDatabase();
+
+        $sql = "
+            SELECT
+                table_name,
+                table_rows,
+                ROUND((data_length + index_length) / 1024 / 1024, 2) as size_mb,
+                engine,
+                table_collation
+            FROM information_schema.tables
+            WHERE table_schema = ?
+            AND table_name = ?
+        ";
+
+        $query = SqlQuery::create($sql, [$databaseName, $tableName]);
+        $result = $this->connection->query($query);
+        $row = $result->fetch();
+
+        if ($row === null) {
+            return null;
+        }
+
+        return new TableMetadata(
+            name: $row['table_name'],
+            rowCount: isset($row['table_rows']) ? (int) $row['table_rows'] : null,
+            sizeMb: isset($row['size_mb']) ? (float) $row['size_mb'] : null,
+            engine: $row['engine'] ?? null,
+            collation: $row['table_collation'] ?? null,
+        );
+    }
+
+    /**
+     * Get current database name
+     */
+    private function getCurrentDatabase(): string
+    {
+        $sql = "SELECT DATABASE() as db";
+        $query = SqlQuery::create($sql, []);
+        $result = $this->connection->query($query);
+        $row = $result->fetch();
+
+        return $row['db'] ?? 'unknown';
+    }
+}
+