Add SkillProgressionAnomalyAnalyser

Compares consecutive perks-snapshot rows per Steam ID and emits a
SkillProgressionAnomalyProblem for any single skill whose level gained
more than THRESHOLD_DELTA between two snapshots. Login/Logout/LevelUp
event rows are skipped via a perk-pair regex check on the bracketed
event field.

Threshold of 3 reflects PZ's slow leveling pace: typical session bridges
should not produce four-or-more level jumps in a single skill. The
constant is documented inline so operators can tune for modded XP
servers without touching analysis logic.

Synthetic fixture extended with a PlayerSuspect Steam ID carrying two
snapshots: Strength jumps 2 -> 10 (delta +8, triggers), Fitness jumps
2 -> 8 (+6, triggers), Maintenance jumps 0 -> 3 (+3, exactly at
threshold, does NOT trigger). The existing single-snapshot players
remain noise-free.

test/src/Games/ProjectZomboid/fixtures/perk-minimal.txt

@@ -4,3 +4,7 @@
 [16-04-26 18:29:15.823] [76561198000000002][Player2][1010,2010,0][Cooking=2, Fitness=10, Strength=10, Blunt=10, Axe=0, Lightfoot=4, Nimble=4, Sprinting=7, Sneak=2, Woodwork=6, Aiming=5, Reloading=4, Farming=0, Fishing=0, Trapping=0, PlantScavenging=0, Doctor=2, Electricity=5, Blacksmith=8, MetalWelding=10, Mechanics=10, Spear=0, Maintenance=7, SmallBlade=0, LongBlade=0, SmallBlunt=0, Tailoring=0, Tracking=0, Husbandry=0, FlintKnapping=0, Masonry=0, Pottery=0, Carving=0, Butchering=0, Glassmaking=0, Side_L=0, Side_R=0, ProstFamiliarity=0][Hours Survived: 50].
 [16-04-26 18:30:02.500] [76561198000000003][AdminUser][1020,2020,0][Logout][Hours Survived: 75].
 [16-04-26 19:15:00.000] [76561198000000001][Player1][1003,2003,1][LevelUp][Hours Survived: 101].
+[16-04-26 18:30:00.000] [76561198000000004][PlayerSuspect][1030,2030,0][Login][Hours Survived: 10].
+[16-04-26 18:30:00.000] [76561198000000004][PlayerSuspect][1030,2030,0][Cooking=2, Fitness=2, Strength=2, Blunt=0, Axe=0, Lightfoot=0, Nimble=0, Sprinting=0, Sneak=0, Woodwork=0, Aiming=0, Reloading=0, Farming=0, Fishing=0, Trapping=0, PlantScavenging=0, Doctor=0, Electricity=0, Blacksmith=0, MetalWelding=0, Mechanics=0, Spear=0, Maintenance=0, SmallBlade=0, LongBlade=0, SmallBlunt=0, Tailoring=0, Tracking=0, Husbandry=0, FlintKnapping=0, Masonry=0, Pottery=0, Carving=0, Butchering=0, Glassmaking=0, Side_L=0, Side_R=0, ProstFamiliarity=0][Hours Survived: 10].
+[16-04-26 22:00:00.000] [76561198000000004][PlayerSuspect][1031,2031,0][Login][Hours Survived: 12].
+[16-04-26 22:00:00.000] [76561198000000004][PlayerSuspect][1031,2031,0][Cooking=2, Fitness=8, Strength=10, Blunt=0, Axe=0, Lightfoot=0, Nimble=0, Sprinting=0, Sneak=0, Woodwork=0, Aiming=0, Reloading=0, Farming=0, Fishing=0, Trapping=0, PlantScavenging=0, Doctor=0, Electricity=0, Blacksmith=0, MetalWelding=0, Mechanics=0, Spear=0, Maintenance=3, SmallBlade=0, LongBlade=0, SmallBlunt=0, Tailoring=0, Tracking=0, Husbandry=0, FlintKnapping=0, Masonry=0, Pottery=0, Carving=0, Butchering=0, Glassmaking=0, Side_L=0, Side_R=0, ProstFamiliarity=0][Hours Survived: 12].

test/tests/Games/ProjectZomboid/Analyser/PerkLogAnalysisTest.php

@@ -0,0 +1,66 @@
+<?php
+
+namespace IndifferentKetchup\Codex\Test\Tests\Games\ProjectZomboid\Analyser;
+
+use IndifferentKetchup\Codex\Analyser\ProjectZomboid\SkillProgressionAnomalyAnalyser;
+use IndifferentKetchup\Codex\Analysis\ProjectZomboid\SkillProgressionAnomalyProblem;
+use IndifferentKetchup\Codex\Log\File\PathLogFile;
+use IndifferentKetchup\Codex\Log\ProjectZomboid\ProjectZomboidPerkLog;
+use PHPUnit\Framework\TestCase;
+
+class PerkLogAnalysisTest extends TestCase
+{
+    private function fixturePath(): string
+    {
+        return __DIR__ . '/../../../../src/Games/ProjectZomboid/fixtures/perk-minimal.txt';
+    }
+
+    public function testFlagsSkillsThatExceedDeltaThreshold(): void
+    {
+        $log = (new ProjectZomboidPerkLog())->setLogFile(new PathLogFile($this->fixturePath()));
+        $log->parse();
+        $analysis = $log->analyse();
+
+        $problems = $analysis->getFilteredInsights(SkillProgressionAnomalyProblem::class);
+
+        $skills = array_map(fn($p) => $p->getSkill(), $problems);
+        sort($skills);
+
+        $this->assertSame(['Fitness', 'Strength'], $skills);
+
+        foreach ($problems as $problem) {
+            $this->assertSame('76561198000000004', $problem->getSteamId());
+            $this->assertSame('PlayerSuspect', $problem->getPlayer());
+        }
+    }
+
+    public function testDeltaAtThresholdDoesNotTrigger(): void
+    {
+        $log = (new ProjectZomboidPerkLog())->setLogFile(new PathLogFile($this->fixturePath()));
+        $log->parse();
+        $analysis = $log->analyse();
+
+        $problems = $analysis->getFilteredInsights(SkillProgressionAnomalyProblem::class);
+        foreach ($problems as $problem) {
+            $this->assertNotSame('Maintenance', $problem->getSkill());
+        }
+    }
+
+    public function testSinglePlayerWithOneSnapshotProducesNoProblem(): void
+    {
+        $log = (new ProjectZomboidPerkLog())->setLogFile(new PathLogFile($this->fixturePath()));
+        $log->parse();
+        $analysis = $log->analyse();
+
+        $problems = $analysis->getFilteredInsights(SkillProgressionAnomalyProblem::class);
+        foreach ($problems as $problem) {
+            $this->assertNotSame('76561198000000001', $problem->getSteamId());
+            $this->assertNotSame('76561198000000002', $problem->getSteamId());
+        }
+    }
+
+    public function testThresholdConstantIsDocumentedAndPositive(): void
+    {
+        $this->assertGreaterThan(0, SkillProgressionAnomalyAnalyser::THRESHOLD_DELTA);
+    }
+}

test/tests/Games/ProjectZomboid/Log/ProjectZomboidPerkLogTest.php

@@ -20,7 +20,7 @@ class ProjectZomboidPerkLogTest extends TestCase
         $log = (new ProjectZomboidPerkLog())->setLogFile(new PathLogFile($this->fixturePath()));
         $log->parse();
 
-        $this->assertCount(6, $log->getEntries());
+        $this->assertCount(10, $log->getEntries());
     }
 
     public function testFieldsRegexHandlesEventRow(): void