feat: sla 1 - refactor sla_policies model and add applied_sla model (#8602)

* feat: add models

* chore: refactor sla column names

* chore: remove foreign keys

* chore: fix spec

* chore: refactor models

db/migrate/20231223033019_refactor_sla_policy_columns.rb

@@ -0,0 +1,8 @@
+class RefactorSlaPolicyColumns < ActiveRecord::Migration[7.0]
+  def change
+    rename_column :sla_policies, :rt_threshold, :next_response_time_threshold
+    rename_column :sla_policies, :frt_threshold, :first_response_time_threshold
+    add_column :sla_policies, :description, :string
+    add_column :sla_policies, :resolution_time_threshold, :float
+  end
+end

db/migrate/20231223040257_create_applied_slas.rb

@@ -0,0 +1,13 @@
+class CreateAppliedSlas < ActiveRecord::Migration[7.0]
+  def change
+    create_table :applied_slas do |t|
+      t.references :account, null: false
+      t.references :sla_policy, null: false
+      t.references :conversation, null: false
+
+      t.string :sla_status
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_12_19_073832) do
+ActiveRecord::Schema[7.0].define(version: 2023_12_23_040257) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_stat_statements"
   enable_extension "pg_trgm"
@@ -115,6 +115,18 @@ ActiveRecord::Schema[7.0].define(version: 2023_12_19_073832) do
     t.index ["account_id"], name: "index_agent_bots_on_account_id"
   end
 
+  create_table "applied_slas", force: :cascade do |t|
+    t.bigint "account_id", null: false
+    t.bigint "sla_policy_id", null: false
+    t.bigint "conversation_id", null: false
+    t.string "sla_status"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["account_id"], name: "index_applied_slas_on_account_id"
+    t.index ["conversation_id"], name: "index_applied_slas_on_conversation_id"
+    t.index ["sla_policy_id"], name: "index_applied_slas_on_sla_policy_id"
+  end
+
   create_table "articles", force: :cascade do |t|
     t.integer "account_id", null: false
     t.integer "portal_id", null: false
@@ -824,12 +836,14 @@ ActiveRecord::Schema[7.0].define(version: 2023_12_19_073832) do
 
   create_table "sla_policies", force: :cascade do |t|
     t.string "name", null: false
-    t.float "frt_threshold"
-    t.float "rt_threshold"
+    t.float "first_response_time_threshold"
+    t.float "next_response_time_threshold"
     t.boolean "only_during_business_hours", default: false
     t.bigint "account_id", null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.string "description"
+    t.float "resolution_time_threshold"
     t.index ["account_id"], name: "index_sla_policies_on_account_id"
   end