node: add supply tracking to archive node

node/migrations/20260130152449_supply_info.sql

@@ -0,0 +1,15 @@
+-- Single-row table tracking current supply statistics
+-- This table always contains exactly one row (id=1) that gets updated
+CREATE TABLE IF NOT EXISTS supply_info (
+    id INTEGER PRIMARY KEY NOT NULL CHECK (id = 1),   -- Constrained to 1 to enforce single-row table
+    block_height INTEGER NOT NULL,                    -- Current block height of these stats
+    total_supply REAL NOT NULL,                       -- Total coins created minus burned coins (floating point)
+    circulating_supply REAL NOT NULL,                 -- Coins in public circulation (floating point)
+    max_supply REAL NOT NULL,                         -- Theoretical maximum coins that can exist minus burned (floating point)
+    burned REAL NOT NULL,                             -- Total coins verifiably burned (floating point)
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL  -- Last update timestamp
+);
+
+-- Insert the initial row with default values
+INSERT INTO supply_info (id, block_height, total_supply, circulating_supply, max_supply, burned)
+VALUES (1, 0, 500000000.0, 500000000.0, 1000000000.0, 0.0);

node/src/archive.rs

@@ -20,6 +20,7 @@ mod transformer;
 use conf::Params as ArchiveParams;
 
 pub use moonlight::{MoonlightGroup, Order};
+pub use sqlite::SupplyInfo;
 
 // Archive folder containing the sqlite database and the moonlight database
 const ARCHIVE_FOLDER_NAME: &str = "archive";