frappix: add mysqlclient to insights for ibis mysql backend

insights' after_migrate hook connects to the Site DB data source via
ibis.mysql; the ibis 12 mysql backend imports MySQLdb, which frappix
does not ship. Fixes b4lerp migrate failing on bosona.

machines/bosona/configuration.nix

@@ -50,6 +50,7 @@ in
     apps = [
       pkgs.frappix.erpnext
       pkgs.frappix.hrms
+      pkgs.frappix.insights
       pkgs.frappix.default_thai_company
     ];
     sites = {
@@ -59,6 +60,7 @@ in
           "frappe"
           "erpnext"
           "hrms"
+          "insights"
           "default_thai_company"
         ];
       };

pkgs/frappix/default-thai-company.nix

@@ -11,8 +11,8 @@ let
     domain = "git.b4l.co.th";
     owner = "newedge";
     repo = "default_thai_company";
-    rev = "c8fb98374989a22d0c907aa44877f247391a49ac";
+    rev = "b4c7274dce7ad6eaa486391b0a8d3e29f6da848f";
-    sha256 = "sha256-c+pqds4l3Laldgf3+Rj2Ug693kFJYDB1j4a15j4U5SY=";
+    sha256 = "sha256-8yb9ntayP9zpboydtOWzeAQOK27v6fydVIOTrWCuvFY=";
   };
 in
 buildPythonPackage (finalAttrs: {

pkgs/frappix/overlay.nix

@@ -2,8 +2,15 @@
 # Must be applied after frappixFrappeOverlay (needs prev.frappix).
 final: prev: {
   frappix = prev.frappix.overrideScope (
-    ffinal: _fprev: {
+    ffinal: fprev: {
       default_thai_company = ffinal.callPackage ./default-thai-company.nix { };
+
+      # insights' after_migrate hook opens the "Site DB" data source via
+      # ibis.mysql, whose backend imports MySQLdb (mysqlclient) since ibis 10.
+      # Upstream frappix only ships ibis-framework without the mysql extra.
+      insights = fprev.insights.overridePythonAttrs (old: {
+        dependencies = old.dependencies ++ [ final.python3.pkgs.mysqlclient ];
+      });
     }
   );
 }