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>

app/models/account/trade_builder.rb

@@ -111,13 +111,10 @@ class Account::TradeBuilder
     end
 
     def security
-      ticker_symbol, exchange_mic, exchange_acronym, exchange_country_code = ticker.split("|")
+      ticker_symbol, exchange_operating_mic = ticker.split("|")
 
-      security = Security.find_or_create_by(ticker: ticker_symbol, exchange_mic: exchange_mic, country_code: exchange_country_code)
-      security.update(exchange_acronym: exchange_acronym)
-
-      FetchSecurityInfoJob.perform_later(security.id)
-
-      security
+      Security.find_or_create_by(ticker: ticker_symbol, exchange_operating_mic: exchange_operating_mic) do |s|
+        FetchSecurityInfoJob.perform_later(s.id)
+      end
     end
 end