Add ProjectZomboidServerLog (DebugLog-server.txt)

Concrete Log subclass for the engine debug log. Captures time, level,
and subsystem prefix per entry; stack-trace continuation lines attach
to the triggering ERROR entry via PatternParser's append-on-no-match
behaviour. Detectors: filename match on DebugLog-server.txt plus two
content signatures (the version=X.Y.Z+hash banner and the level/
subsystem/f/t/st header shape). Pattern constants live in
src/Pattern/ProjectZomboid/DebugServerPattern.php with named groups
ready for analyser use in phase B. Synthetic fixture under
test/src/Games/ProjectZomboid/fixtures/ uses zeroed identifiers and
placeholder paths.

src/Log/ProjectZomboid/ProjectZomboidServerLog.php

@@ -0,0 +1,54 @@
+<?php
+
+namespace IndifferentKetchup\Codex\Log\ProjectZomboid;
+
+use IndifferentKetchup\Codex\Analyser\AnalyserInterface;
+use IndifferentKetchup\Codex\Analyser\PatternAnalyser;
+use IndifferentKetchup\Codex\Detective\FilenameDetector;
+use IndifferentKetchup\Codex\Detective\WeightedSinglePatternDetector;
+use IndifferentKetchup\Codex\Parser\ParserInterface;
+use IndifferentKetchup\Codex\Parser\PatternParser;
+use IndifferentKetchup\Codex\Pattern\ProjectZomboid\DebugServerPattern;
+
+/**
+ * Project Zomboid engine debug log (DebugLog-server.txt).
+ *
+ * Multi-line format: ERROR entries are followed by tab-indented stack trace
+ * frames. PatternParser handles continuation by appending non-matching lines
+ * to the most recent Entry, which is exactly the behaviour we need.
+ */
+class ProjectZomboidServerLog extends ProjectZomboidLog
+{
+    public static function getDefaultParser(): ParserInterface
+    {
+        return static::makePatternParser(
+            DebugServerPattern::LINE,
+            [PatternParser::TIME, PatternParser::LEVEL, PatternParser::PREFIX]
+        );
+    }
+
+    public static function getDefaultAnalyser(): AnalyserInterface
+    {
+        return new PatternAnalyser();
+    }
+
+    public static function getDetectors(): array
+    {
+        return [
+            (new FilenameDetector())
+                ->setPattern('/DebugLog-server\.txt$/')
+                ->setWeight(0.95),
+            (new WeightedSinglePatternDetector())
+                ->setPattern('/version=\d+\.\d+\.\d+ [a-f0-9]{40}/')
+                ->setWeight(0.95),
+            (new WeightedSinglePatternDetector())
+                ->setPattern('/^\[\d{2}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d{3}\] (?:LOG|WARN|ERROR):\s+\w+\s+f:\d+, t:\d+, st:[\d,]+>/m')
+                ->setWeight(0.80),
+        ];
+    }
+
+    public function getTitle(): string
+    {
+        return "Project Zomboid Debug Server Log";
+    }
+}