Improve Sonic Java discovery beyond SonicHome\jre layouts.

Parse setenv scripts, search recursively under Sonic/MQ/ESB roots, and surface resolved SonicHome + java paths in the UI and full error lists.

Co-authored-by: Cursor <cursoragent@cursor.com>

ZA.CoreService.ESBCertificateManager/Models/SonicConnection.cs

@@ -127,12 +127,15 @@ public sealed class SonicConnection
         return false;
     }
 
-    /// <summary>Sonic-Installationsroot, z.B. "C:\Sonic\MQ10.0" (enthält lib\*.jar für MfApi).</summary>
+    /// <summary>
+    /// Sonic-/MQ-/ESB-Installationsroot, z.B. "C:\Sonic\MQ10.0" (Client-JARs oft unter lib).
+    /// Bei ESB-Home: ggf. MfClientLibPath auf MQ\lib setzen.
+    /// </summary>
     public string SonicHome { get; init; } = @"C:\Sonic\MQ10.0";
 
     /// <summary>
     /// Optional: JRE/JDK-Home (z.B. C:\Sonic\MQ10.0\jre) oder Pfad zu java.exe.
-    /// Leer = automatische Suche (JAVA_HOME, PATH, SonicHome\jre, Program Files\…).
+    /// Leer = automatische Suche (JAVA_HOME/JRE_HOME, setenv.bat, rekursiv unter SonicHome, Registry, …).
     /// </summary>
     public string JavaHome { get; init; } = string.Empty;
 
@@ -143,7 +146,7 @@ public sealed class SonicConnection
 
     /// <summary>
     /// Optionaler Pfad zu Sonic-Client-JARs für MfApi (mgmt_client.jar etc.).
-    /// Leer = SonicHome\lib.
+    /// Leer = SonicHome\lib, MQ_HOME\lib, ESB_HOME\lib bzw. nested MQ*/lib.
     /// </summary>
     public string MfClientLibPath { get; init; } = string.Empty;