fix(dump): correct DI wiring, config types, and runtime version query

src/Resources/config/config.xml

@@ -6,12 +6,12 @@
     <card>
         <title>Minimal configuration</title>
 
-        <input-field type="number">
+        <input-field type="int">
             <name>maxDumps</name>
             <label>Maximum allowed dumps to exist</label>
             <defaultValue>6</defaultValue>
         </input-field>
-        <input-field type="number">
+        <input-field type="int">
             <name>retantionDays</name>
             <label>How many Days the dumps kept in the Storage. 0 Means unlimited</label>
             <defaultValue>0</defaultValue>
@@ -19,7 +19,6 @@
         <input-field type="text">
             <name>dumpBinaryName</name>
             <label>Name of the mysqldump/mariadb-dump binary to look up on PATH (e.g. if your distro renamed it). Leave empty to auto-detect.</label>
-            <defaultValue>""</defaultValue>
         </input-field>
     </card>