Add FilenameDetector for path-based log type dispatch

New Detector that matches a configured regex against
LogFileInterface::getPath(). Returns a settable weight on match (default
0.95) and false otherwise, including when the log file has no known path
(StringLogFile, StreamLogFile). Lets game-specific Detectives prefer the
filename hint over content signatures when an upload's original name is
preserved.

src/Detective/FilenameDetector.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace IndifferentKetchup\Codex\Detective;
+
+/**
+ * Match a regex against the source path of the log file
+ *
+ * Returns a configured weight when the LogFileInterface exposes a non-null
+ * path that matches $pattern. Returns false when no path is known
+ * (StringLogFile, StreamLogFile) or when the pattern does not match. Pattern
+ * is compared against the full path; anchor with $ for strict suffix matching.
+ *
+ * @package IndifferentKetchup\Codex\Detective
+ */
+class FilenameDetector extends Detector
+{
+    protected ?string $pattern = null;
+    protected float $weight = 0.95;
+
+    public function setPattern(string $pattern): static
+    {
+        $this->pattern = $pattern;
+        return $this;
+    }
+
+    public function setWeight(float $weight): static
+    {
+        $this->weight = $weight;
+        return $this;
+    }
+
+    public function detect(): bool|float
+    {
+        $path = $this->logFile->getPath();
+        if ($path === null || $this->pattern === null) {
+            return false;
+        }
+
+        if (preg_match($this->pattern, $path) === 1) {
+            return $this->weight;
+        }
+
+        return false;
+    }
+}