Add ConnectionFailureAnalyser

First custom Analyser subclass in this game tree. PatternAnalyser
operates per-entry without cross-entry state, so pairing
'attempting to join' with 'allowed to join' per Steam ID requires a
bespoke pass over the log. The analyser counts attempts and allowed
events per Steam ID and emits a ConnectionFailureProblem for each
player whose attempt count exceeds their allowed count. Unmatched
'attempting to join used queue' rows are surfaced as failures in v1
because a long queue wait is indistinguishable from a real failure
without timing context.

src/Log/ProjectZomboid/ProjectZomboidUserLog.php

@@ -3,7 +3,7 @@
 namespace IndifferentKetchup\Codex\Log\ProjectZomboid;
 
 use IndifferentKetchup\Codex\Analyser\AnalyserInterface;
-use IndifferentKetchup\Codex\Analyser\PatternAnalyser;
+use IndifferentKetchup\Codex\Analyser\ProjectZomboid\ConnectionFailureAnalyser;
 use IndifferentKetchup\Codex\Detective\FilenameDetector;
 use IndifferentKetchup\Codex\Detective\WeightedSinglePatternDetector;
 use IndifferentKetchup\Codex\Parser\ParserInterface;
@@ -22,7 +22,7 @@ class ProjectZomboidUserLog extends ProjectZomboidEventLog
 
     public static function getDefaultAnalyser(): AnalyserInterface
     {
-        return new PatternAnalyser();
+        return new ConnectionFailureAnalyser();
     }
 
     public static function getDetectors(): array