Handle holding quantity generation for reverse syncs correctly when not all holdings are generated for current day (#2417)

* Handle reverse calculator starting portfolio generation correctly

* Fix current_holdings to handle different dates and hide zero quantities

- Use DISTINCT ON to get most recent holding per security instead of assuming same date
- Filter out zero quantity holdings from UI display
- Maintain cash display regardless of zero balance
- Use single efficient query with proper Rails syntax

* Continue to process holdings even if one is not resolvable

* Lint fixes

app/models/holding/reverse_calculator.rb

@@ -1,8 +1,9 @@
 class Holding::ReverseCalculator
-  attr_reader :account
+  attr_reader :account, :portfolio_snapshot
 
-  def initialize(account)
+  def initialize(account, portfolio_snapshot:)
     @account = account
+    @portfolio_snapshot = portfolio_snapshot
   end
 
   def calculate
@@ -21,7 +22,8 @@ class Holding::ReverseCalculator
     end
 
     def calculate_holdings
-      current_portfolio = generate_starting_portfolio
+      # Start with the portfolio snapshot passed in from the materializer
+      current_portfolio = portfolio_snapshot.to_h
       previous_portfolio = {}
 
       holdings = []
@@ -38,24 +40,6 @@ class Holding::ReverseCalculator
       holdings
     end
 
-    def empty_portfolio
-      securities = portfolio_cache.get_securities
-      securities.each_with_object({}) { |security, hash| hash[security.id] = 0 }
-    end
-
-    # Since this is a reverse sync, we start with today's holdings
-    def generate_starting_portfolio
-      holding_quantities = empty_portfolio
-
-      todays_holdings = account.holdings.where(date: Date.current)
-
-      todays_holdings.each do |holding|
-        holding_quantities[holding.security_id] = holding.qty
-      end
-
-      holding_quantities
-    end
-
     def transform_portfolio(previous_portfolio, trade_entries, direction: :forward)
       new_quantities = previous_portfolio.dup