Lunchflow integration (#259)

* First pass lunch flow

* Fixes

- Fix apikey not being saved properly due to provider no reload support
- Fix proper messages if we try to link existing accounts.

* Fix better error handling

* Filter existing transactions and skip duplicates

* FIX messaging

* Branding :)

* Fix XSS and linter

* FIX provider concern

- also fix code duplication

* FIX md5 digest

* Updated determine_sync_start_date to be account-aware

* Review fixes

* Broaden error catch to not crash UI

* Fix buttons styling

* FIX process account error handling

* FIX account cap and url parsing

* Lunch Flow brand

* Found orphan i18n strings

* Remove per conversation with @sokie

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Co-authored-by: Juan José Mata <juanjo.mata@gmail.com>

app/models/data_enrichment.rb

@@ -1,5 +1,5 @@
 class DataEnrichment < ApplicationRecord
   belongs_to :enrichable, polymorphic: true
 
-  enum :source, { rule: "rule", plaid: "plaid", simplefin: "simplefin", synth: "synth", ai: "ai" }
+  enum :source, { rule: "rule", plaid: "plaid", simplefin: "simplefin", lunchflow: "lunchflow", synth: "synth", ai: "ai" }
 end