fixed exchange mappings and added visible column

database/postgres/init/05-add-visible-column.sql

@@ -0,0 +1,35 @@
+-- Add visible column to exchanges table
+-- Connect to trading_bot database
+\c trading_bot;
+
+-- Add visible column to exchanges table with default true
+ALTER TABLE exchanges 
+ADD COLUMN IF NOT EXISTS visible BOOLEAN DEFAULT true;
+
+-- Update existing records to be visible by default
+UPDATE exchanges SET visible = true WHERE visible IS NULL;
+
+-- Create index for visibility filtering
+CREATE INDEX IF NOT EXISTS idx_exchanges_visible ON exchanges(visible);
+
+-- Update the exchange_provider_summary view to include visibility
+CREATE OR REPLACE VIEW exchange_provider_summary AS
+SELECT 
+    e.code as master_code,
+    e.name as master_name,
+    e.country,
+    e.currency,
+    e.active as master_active,
+    e.visible as master_visible,
+    COUNT(pem.id) as provider_mappings,
+    COUNT(CASE WHEN pem.active = true THEN 1 END) as active_mappings,
+    COUNT(CASE WHEN pem.verified = true THEN 1 END) as verified_mappings,
+    STRING_AGG(DISTINCT pem.provider, ', ') as providers
+FROM exchanges e
+LEFT JOIN provider_exchange_mappings pem ON e.id = pem.master_exchange_id
+WHERE e.visible = true  -- Only show visible exchanges in summary
+GROUP BY e.id, e.code, e.name, e.country, e.currency, e.active, e.visible
+ORDER BY e.code;
+
+-- Show what we created
+SELECT 'Added visible column to exchanges table' as status;