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/security/price/provided.rb

@@ -8,6 +8,7 @@ module Security::Price::Provided
 
       def fetch_price_from_provider(security:, date:, cache: false)
         return nil unless security_prices_provider.present?
+        return nil unless security.has_prices?
 
         response = security_prices_provider.fetch_security_prices \
           ticker: security.ticker,
@@ -32,6 +33,7 @@ module Security::Price::Provided
       def fetch_prices_from_provider(security:, start_date:, end_date:, cache: false)
         return [] unless security_prices_provider.present?
         return [] unless security
+        return [] unless security.has_prices?
 
         response = security_prices_provider.fetch_security_prices \
           ticker: security.ticker,