Fix null→false, stock seed data, action_get on model, FK order

- Normalize null DB values to false (Odoo convention) in web_search_read
  and web_read responses
- Seed stock reference data: 6 locations, 1 warehouse, 3 picking types
- Fix FK order: warehouse must be created before picking types
- Move action_get from hardcoded dispatcher to res.users RegisterMethod
- Add action_res_users_my (ID 103) to seedActions
- Remove hardcoded action_get case from dispatchORM

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pkg/server/server.go

@@ -629,20 +629,6 @@ func (s *Server) dispatchORM(env *orm.Environment, params CallKWParams) (interfa
 	case "activity_format":
 		return []interface{}{}, nil
 
-	case "action_get":
-		// res.users.action_get() — returns the preference action
-		// Mirrors: odoo/addons/base/models/res_users.py action_get()
-		return map[string]interface{}{
-			"type":      "ir.actions.act_window",
-			"name":      "Change My Preferences",
-			"res_model": "res.users",
-			"view_mode": "form",
-			"views":     [][]interface{}{{false, "form"}},
-			"target":    "new",
-			"res_id":    env.UID(),
-			"context":   map[string]interface{}{},
-		}, nil
-
 	case "action_archive":
 		ids := parseIDs(params.Args)
 		if len(ids) > 0 {