Time time series (#708)

* feat: Add created_time and paid_time fields to MintQuote struct

* feat: Add serde default of 0 for created_time in MintQuote

* feat: Add created_time and paid_time to MintQuote and MeltQuote structs

* feat: Add paid_time update when setting melt quote state to Paid

* fix: Update melt quote state with current Unix timestamp

* feat: Add paid_time update for mint quote when state is set to Paid

* feat: Add issued_time field to MintQuote conversion from SQLite row

* feat: Add issued_time tracking for MintQuoteState::Issued state

* feat: Add migration script for mint time of quotes

* feat: Add timestamp columns to mint_quote and melt_quote tables

* feat: Add timestamp columns to `add_mint_quote` method

* refactor: Improve code formatting and readability in mint quote state update logic

* feat: Add created_time and paid_time columns to melt_quote query

* feat: time on mint and melt quotes

* feat: Add migration script for mint created time signature

feat: Add created_time column to blind_signature table

feat: Add created_time to blind_signature insertion

feat: Add created_time column to proof table and update insert query

feat: time on mint and melt quotes

* feat: Add new table to track blind signature creation time

* feat: Add timestamp tracking for proofs in ReDB database

* feat: redb proof time

* chore: fmt

crates/cdk-payment-processor/src/proto/payment_processor.proto

@@ -81,6 +81,8 @@ message MeltQuote {
     optional string payment_preimage = 8;
     string request_lookup_id = 9;
     optional uint64 msat_to_pay = 10;
+    uint64 created_time = 11;
+    optional uint64 paid_time = 12;
 }
 
 message MakePaymentRequest {