Enhance security information retrieval and handling (#1826)

* Enhance security information retrieval and handling

- Add support for operating MIC codes in security info fetching
- Update security uniqueness validation to handle unknown securities
- Improve security creation and update logic in Plaid investment sync
- Update combobox and view components to handle operating MIC codes
- Add unknown flag for securities with incomplete information

* Update schema.rb

* Refactor the need for mic codes

* Don't fetch prices unless a security has the necessary mic code

* Deduplication

* Lint

* Update Securities and Plaid Investment Sync

- Modify PlaidInvestmentSync to return plaid_security for USD cash
- Add non-null constraint to Securities ticker column
- Update Securities fixture to use exchange_operating_mic instead of exchange_mic

---------

Signed-off-by: Josh Pigford <josh@joshpigford.com>

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: 2025_02_07_014022) do
+ActiveRecord::Schema[7.2].define(version: 2025_02_11_161238) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pgcrypto"
   enable_extension "plpgsql"
@@ -542,7 +542,7 @@ ActiveRecord::Schema[7.2].define(version: 2025_02_07_014022) do
   end
 
   create_table "securities", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
-    t.string "ticker"
+    t.string "ticker", null: false
     t.string "name"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
@@ -550,8 +550,10 @@ ActiveRecord::Schema[7.2].define(version: 2025_02_07_014022) do
     t.string "exchange_mic"
     t.string "exchange_acronym"
     t.string "logo_url"
+    t.string "exchange_operating_mic"
     t.index ["country_code"], name: "index_securities_on_country_code"
-    t.index ["ticker", "exchange_mic"], name: "index_securities_on_ticker_and_exchange_mic", unique: true
+    t.index ["exchange_operating_mic"], name: "index_securities_on_exchange_operating_mic"
+    t.index ["ticker", "exchange_operating_mic"], name: "index_securities_on_ticker_and_exchange_operating_mic", unique: true
   end
 
   create_table "security_prices", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|