backgroundremover: 0.3.4 -> 0.4.4

https://github.com/nadermx/backgroundremover/releases/tag/v0.4.4

Add flask and pillow-heif to match upstream requirements.txt so
pythonRuntimeDepsCheckHook succeeds (nixpkgs-update 2026-06-28 failure).

Signed-off-by: lucasew <lucas59356@gmail.com>
Assisted-by: Grok Build / Grok 4.3 (xAI)

pkgs/by-name/ba/backgroundremover/package.nix

@@ -12,7 +12,7 @@ let
   p = python3.pkgs;
   self = p.buildPythonApplication rec {
     pname = "backgroundremover";
-    version = "0.3.4";
+    version = "0.4.4";
     pyproject = true;
 
     build-system = [
@@ -23,7 +23,7 @@ let
       owner = "nadermx";
       repo = "backgroundremover";
       tag = "v${version}";
-      hash = "sha256-7C31wlokX3M4csZ4ZbOqxowQvh8DMQJJcENKgQWNTa8=";
+      hash = "sha256-S6irFkNw+5HHr3ziMRxaeg3QoXWe1qqf10CGTTHKpb4=";
     };
 
     models = runCommand "background-remover-models" { } ''
@@ -51,12 +51,14 @@ let
       p.ffmpeg-python
       p.filelock
       p.filetype
+      p.flask
       p.hsh
       p.idna
       p.more-itertools
       p.moviepy
       p.numpy
       p.pillow
+      p.pillow-heif
       p.pymatting
       p.pysocks
       p.requests