Realistic demo data for performance testing (#2361)

* Realistic demo data for performance testing

* Add note about performance testing

* Fix bugbot issues

* More realistic account values

app/models/demo/scenarios/default.rb

@@ -0,0 +1,77 @@
+# Default demo scenario - comprehensive realistic data for product demonstrations
+#
+# This scenario creates a complete, realistic demo environment that showcases
+# all of Maybe's features with believable data patterns. Ideal for:
+# - Product demonstrations to potential users
+# - UI/UX testing with realistic data volumes
+# - Feature development with complete data sets
+# - Screenshots and marketing materials
+#
+class Demo::Scenarios::Default < Demo::BaseScenario
+  # Scenario characteristics and configuration
+  SCENARIO_NAME = "Comprehensive Demo".freeze
+  PURPOSE = "Complete realistic demo environment showcasing all Maybe features".freeze
+  TARGET_ACCOUNTS_PER_FAMILY = 7 # 1 each: checking, savings, credit card, 3 investments, 1 property+mortgage
+  TARGET_TRANSACTIONS_PER_FAMILY = 50 # Realistic 3-month transaction history
+  INCLUDES_SECURITIES = true
+  INCLUDES_TRANSFERS = true
+  INCLUDES_RULES = true
+
+  private
+
+    # Load securities before generating family data
+    # Securities are needed for investment account trades
+    def setup(**options)
+      @generators[:security_generator].load_securities!
+      puts "Securities loaded for investment accounts"
+    end
+
+    # Generate complete family financial data
+    # Creates all account types with realistic balances and transaction patterns
+    #
+    # @param family [Family] The family to generate data for
+    # @param options [Hash] Additional options (unused in this scenario)
+    def generate_family_data!(family, **options)
+      create_foundational_data!(family)
+      create_all_account_types!(family)
+      create_realistic_transaction_patterns!(family)
+      create_account_transfers!(family)
+    end
+
+    # Create rules, tags, categories, and merchants for the family
+    def create_foundational_data!(family)
+      @generators[:rule_generator].create_rules!(family)
+      @generators[:rule_generator].create_tags!(family)
+      @generators[:rule_generator].create_categories!(family)
+      @generators[:rule_generator].create_merchants!(family)
+      puts "  - Rules, categories, and merchants created"
+    end
+
+    # Create one of each major account type to demonstrate full feature set
+    def create_all_account_types!(family)
+      @generators[:account_generator].create_credit_card_accounts!(family)
+      @generators[:account_generator].create_checking_accounts!(family)
+      @generators[:account_generator].create_savings_accounts!(family)
+      @generators[:account_generator].create_investment_accounts!(family)
+      @generators[:account_generator].create_properties_and_mortgages!(family)
+      @generators[:account_generator].create_vehicles_and_loans!(family)
+      @generators[:account_generator].create_other_accounts!(family)
+      puts "  - All #{TARGET_ACCOUNTS_PER_FAMILY} account types created"
+    end
+
+    # Generate realistic transaction patterns across all accounts
+    def create_realistic_transaction_patterns!(family)
+      @generators[:transaction_generator].create_realistic_transactions!(family)
+      puts "  - Realistic transaction patterns created (~#{TARGET_TRANSACTIONS_PER_FAMILY} transactions)"
+    end
+
+    # Create transfer patterns between accounts (credit card payments, investments, etc.)
+    def create_account_transfers!(family)
+      @generators[:transfer_generator].create_transfer_transactions!(family)
+      puts "  - Account transfer patterns created"
+    end
+
+    def scenario_name
+      SCENARIO_NAME
+    end
+end