chore(studio): editor 0.5.0 — unified port model

Picks up fai_studio_flow_editor 0.5.0 (commit 099cd18):

 - Each port is a single dot (no more inline + canvas
   duplication). Sized to match label rows.
 - Inputs endpoint dots sit on the RIGHT edge (data flows
   out), labels right-aligned. Outputs endpoint stays on
   the left. Step input dots stay on the left.
 - Filled when the port participates in an edge, outlined
   when dangling. Type-coloured for inputs-endpoint dots.
 - Right-click a wired input port to Disconnect — clears
   the with-field / output expression cleanly.

Version 0.53.1 -> 0.53.2.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

pubspec.lock

@@ -125,10 +125,10 @@ packages:
     description:
       path: "."
       ref: main
-      resolved-ref: fb8892687d7d3449c9e073789bd17b5a3e16bfed
+      resolved-ref: "099cd182b96bace248eb8375e4b217a6dfaaab16"
       url: "https://git.flemming.ai/fai/studio-flow-editor"
     source: git
-    version: "0.4.0"
+    version: "0.5.0"
   fake_async:
     dependency: transitive
     description: