feat(fls): a project's own applications through the editor model

The model carries the captured beans of a project's own applications
(ownApplicationsByNodeId); the export writes them again on the system
software of their node, and their classes go with the archive's other
entries. Checked by Java: from the exported files FILIUS loads
Accumulator and Broadcast as from the original; the export test no longer
leaves own applications out, and a probe that drops them is caught.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/fls/test/exported.java.json

@@ -8100,7 +8100,15 @@
             "directory": "root",
             "children": []
           },
-          "applications": [],
+          "applications": [
+            {
+              "key": "filius.software.clientserver.Accumulator",
+              "class": "filius.software.clientserver.Accumulator",
+              "onItsSystem": true,
+              "aktiv": true,
+              "port": 55555
+            }
+          ],
           "dhcpClient": false,
           "dhcpServer": {
             "aktiv": false,
@@ -8309,7 +8317,7 @@
       }
     ],
     "documentation": [],
-    "sha256": "955edc9322d1de6bae59ce05221b94ab18983c46193db034cf37fd18f0146a48"
+    "sha256": "acca8f9fe5b317e12472b5e975d0463d367b90896e14a07df46e24fc71feef38"
   },
   "java-examples/dhcp_test_scenario.fls": {
     "success": true,
@@ -13346,6 +13354,13 @@
             "children": []
           },
           "applications": [
+            {
+              "key": "filius.software.clientserver.Broadcast",
+              "class": "filius.software.clientserver.Broadcast",
+              "onItsSystem": true,
+              "aktiv": true,
+              "port": 55555
+            },
             {
               "key": "filius.software.clientserver.ServerBaustein",
               "class": "filius.software.clientserver.ServerBaustein",
@@ -13585,7 +13600,7 @@
       }
     ],
     "documentation": [],
-    "sha256": "b860d1bdf773a92b90f63ff6c7c76e9d0ee2c9b342e6042c3e39f61acf6697e3"
+    "sha256": "4f1a87256f67f1d09a25db7eb2f964663b4728b43592731952a0a30e562cf702"
   },
   "java-examples/nat.fls": {
     "success": true,