Add dashboard performance indexes to example app

example/db/migrate/20260306000001_add_dashboard_performance_indexes.rb

@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+# Migration to add composite indexes for dashboard query performance
+#
+# These indexes optimize the most frequent dashboard queries:
+# - [status, created_at]: now_strip_data conditional counts, error spike detection, top_errors
+# - [model_id, status]: model_stats GROUP BY with success count
+# - [cache_hit, created_at]: cache_savings queries
+class AddDashboardPerformanceIndexes < ActiveRecord::Migration[8.1]
+  def change
+    add_index :ruby_llm_agents_executions, [:status, :created_at],
+      name: "idx_executions_status_created_at",
+      if_not_exists: true
+
+    add_index :ruby_llm_agents_executions, [:model_id, :status],
+      name: "idx_executions_model_id_status",
+      if_not_exists: true
+
+    add_index :ruby_llm_agents_executions, [:cache_hit, :created_at],
+      name: "idx_executions_cache_hit_created_at",
+      if_not_exists: true
+  end
+end

example/db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.1].define(version: 2026_02_16_182104) do
+ActiveRecord::Schema[8.1].define(version: 2026_03_06_000001) do
   create_table "organizations", force: :cascade do |t|
     t.boolean "active", default: true
     t.string "anthropic_api_key"
@@ -51,43 +51,46 @@
 
   create_table "ruby_llm_agents_executions", force: :cascade do |t|
     t.string "agent_type", null: false
-    t.integer "attempts_count", default: 0, null: false
+    t.integer "attempts_count", default: 1, null: false
     t.boolean "cache_hit", default: false
     t.integer "cached_tokens", default: 0
     t.string "chosen_model_id"
     t.datetime "completed_at"
     t.datetime "created_at", null: false
     t.integer "duration_ms"
     t.string "error_class"
-    t.string "execution_type", default: "chat"
+    t.string "execution_type", default: "chat", null: false
     t.string "finish_reason"
     t.decimal "input_cost", precision: 12, scale: 6
-    t.integer "input_tokens"
+    t.integer "input_tokens", default: 0
     t.integer "messages_count", default: 0, null: false
     t.json "metadata", default: {}, null: false
     t.string "model_id", null: false
     t.string "model_provider"
     t.decimal "output_cost", precision: 12, scale: 6
-    t.integer "output_tokens"
+    t.integer "output_tokens", default: 0
     t.bigint "parent_execution_id"
     t.string "request_id"
     t.bigint "root_execution_id"
     t.datetime "started_at", null: false
-    t.string "status", default: "success", null: false
+    t.string "status", default: "running", null: false
     t.boolean "streaming", default: false
     t.decimal "temperature", precision: 3, scale: 2
     t.string "tenant_id"
     t.integer "tool_calls_count", default: 0, null: false
     t.decimal "total_cost", precision: 12, scale: 6
-    t.integer "total_tokens"
+    t.integer "total_tokens", default: 0
     t.string "trace_id"
     t.datetime "updated_at", null: false
     t.index ["agent_type", "created_at"], name: "index_ruby_llm_agents_executions_on_agent_type_and_created_at"
     t.index ["agent_type", "status"], name: "index_ruby_llm_agents_executions_on_agent_type_and_status"
+    t.index ["cache_hit", "created_at"], name: "idx_executions_cache_hit_created_at"
     t.index ["created_at"], name: "index_ruby_llm_agents_executions_on_created_at"
+    t.index ["model_id", "status"], name: "idx_executions_model_id_status"
     t.index ["parent_execution_id"], name: "index_ruby_llm_agents_executions_on_parent_execution_id"
     t.index ["request_id"], name: "index_ruby_llm_agents_executions_on_request_id"
     t.index ["root_execution_id"], name: "index_ruby_llm_agents_executions_on_root_execution_id"
+    t.index ["status", "created_at"], name: "idx_executions_status_created_at"
     t.index ["status"], name: "index_ruby_llm_agents_executions_on_status"
     t.index ["tenant_id", "agent_type"], name: "index_ruby_llm_agents_executions_on_tenant_id_and_agent_type"
     t.index ["tenant_id", "created_at"], name: "index_ruby_llm_agents_executions_on_tenant_id_and_created_at"