Add PHP Analyzer Plugin and Composer Lock Data Handling

- Implemented the PhpAnalyzerPlugin to analyze PHP projects.
- Created ComposerLockData class to represent data from composer.lock files.
- Developed ComposerLockReader to load and parse composer.lock files asynchronously.
- Introduced ComposerPackage class to encapsulate package details.
- Added PhpPackage class to represent PHP packages with metadata and evidence.
- Implemented PhpPackageCollector to gather packages from ComposerLockData.
- Created PhpLanguageAnalyzer to perform analysis and emit results.
- Added capability signals for known PHP frameworks and CMS.
- Developed unit tests for the PHP language analyzer and its components.
- Included sample composer.lock and expected output for testing.
- Updated project files for the new PHP analyzer library and tests.

src/Findings/StellaOps.Findings.Ledger/tools/LedgerReplayHarness/Program.cs

@@ -105,7 +105,8 @@ root.SetHandler(async (FileInfo[] fixtures, string connection, string tenant, in
 
     var verification = await VerifyLedgerAsync(scope.ServiceProvider, tenant, eventsWritten, cts.Token).ConfigureAwait(false);
 
-    var writeLatencyP95Ms = Percentile(metrics.HistDouble("ledger_write_latency_seconds"), 95) * 1000;
+    var writeDurations = metrics.HistDouble("ledger_write_duration_seconds").Concat(metrics.HistDouble("ledger_write_latency_seconds"));
+    var writeLatencyP95Ms = Percentile(writeDurations, 95) * 1000;
     var rebuildP95Ms = Percentile(metrics.HistDouble("ledger_projection_rebuild_seconds"), 95) * 1000;
     var projectionLagSeconds = metrics.GaugeDouble("ledger_projection_lag_seconds").DefaultIfEmpty(0).Max();
     var backlogEvents = metrics.GaugeLong("ledger_ingest_backlog_events").DefaultIfEmpty(0).Max();