Add improvements from security providers to FX providers also (#1445)

* FIX prefer provider rate always

- add debugging also

* Move logic from securities over

* FIXes

* Review fixes

* Update provided.rb

---------

Signed-off-by: soky srm <sokysrm@gmail.com>

db/migrate/20260412120000_create_exchange_rate_pairs.rb

@@ -0,0 +1,16 @@
+class CreateExchangeRatePairs < ActiveRecord::Migration[7.2]
+  def change
+    create_table :exchange_rate_pairs, id: :uuid, default: -> { "gen_random_uuid()" } do |t|
+      t.string :from_currency, null: false
+      t.string :to_currency, null: false
+      t.date :first_provider_rate_on
+      t.string :provider_name
+      t.timestamps
+    end
+
+    add_index :exchange_rate_pairs,
+              [ :from_currency, :to_currency ],
+              unique: true,
+              name: "index_exchange_rate_pairs_on_pair_unique"
+  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[7.2].define(version: 2026_04_11_082125) do
+ActiveRecord::Schema[7.2].define(version: 2026_04_12_120000) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pgcrypto"
   enable_extension "plpgsql"
@@ -551,6 +551,16 @@ ActiveRecord::Schema[7.2].define(version: 2026_04_11_082125) do
     t.index ["tags"], name: "index_eval_samples_on_tags", using: :gin
   end
 
+  create_table "exchange_rate_pairs", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
+    t.string "from_currency", null: false
+    t.string "to_currency", null: false
+    t.date "first_provider_rate_on"
+    t.string "provider_name"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["from_currency", "to_currency"], name: "index_exchange_rate_pairs_on_pair_unique", unique: true
+  end
+
   create_table "exchange_rates", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
     t.string "from_currency", null: false
     t.string "to_currency", null: false