Clarify backend data pipeline naming concepts (importers, processors, materializers, calculators, and syncers) (#2255)

* Rename MarketDataSyncer to MarketDataImporter

* Materializers

* Importers

* More reference replacements

app/models/security/price/importer.rb

@@ -1,4 +1,4 @@
-class Security::Price::Syncer
+class Security::Price::Importer
   MissingSecurityPriceError = Class.new(StandardError)
   MissingStartPriceError    = Class.new(StandardError)
 
@@ -12,7 +12,7 @@ class Security::Price::Syncer
 
   # Constructs a daily series of prices for a single security over the date range.
   # Returns the number of rows upserted.
-  def sync_provider_prices
+  def import_provider_prices
     if !clear_cache && all_prices_exist?
       Rails.logger.info("No new prices to sync for #{security.ticker} between #{start_date} and #{end_date}, skipping")
       return 0

app/models/security/provided.rb

@@ -49,9 +49,9 @@ module Security::Provided
     price
   end
 
-  def sync_provider_details(clear_cache: false)
+  def import_provider_details(clear_cache: false)
     unless provider.present?
-      Rails.logger.warn("No provider configured for Security.sync_provider_details")
+      Rails.logger.warn("No provider configured for Security.import_provider_details")
       return
     end
 
@@ -76,19 +76,19 @@ module Security::Provided
     end
   end
 
-  def sync_provider_prices(start_date:, end_date:, clear_cache: false)
+  def import_provider_prices(start_date:, end_date:, clear_cache: false)
     unless provider.present?
-      Rails.logger.warn("No provider configured for Security.sync_provider_prices")
+      Rails.logger.warn("No provider configured for Security.import_provider_prices")
       return 0
     end
 
-    Security::Price::Syncer.new(
+    Security::Price::Importer.new(
       security: self,
       security_provider: provider,
       start_date: start_date,
       end_date: end_date,
       clear_cache: clear_cache
-    ).sync_provider_prices
+    ).import_provider_prices
   end
 
   private