feat: Add comprehensive CRUD queries for assets using sqlc syntax

x/asset/query.sql

@@ -0,0 +1,65 @@
+-- name: CreateAsset :one
+INSERT INTO assets (
+    id,
+    name,
+    symbol,
+    decimals,
+    chain_id,
+    channel,
+    asset_type,
+    coingecko_id
+) VALUES (?, ?, ?, ?, ?, ?, ?, ?)
+RETURNING *;
+
+-- name: GetAssetByID :one
+SELECT * FROM assets
+WHERE id = ? AND deleted_at IS NULL
+LIMIT 1;
+
+-- name: GetAssetBySymbolAndChain :one
+SELECT * FROM assets
+WHERE symbol = ? AND chain_id = ? AND deleted_at IS NULL
+LIMIT 1;
+
+-- name: ListAssets :many
+SELECT * FROM assets
+WHERE deleted_at IS NULL
+ORDER BY chain_id, symbol;
+
+-- name: ListAssetsByChain :many
+SELECT * FROM assets
+WHERE chain_id = ? AND deleted_at IS NULL
+ORDER BY symbol;
+
+-- name: ListAssetsByType :many
+SELECT * FROM assets
+WHERE asset_type = ? AND deleted_at IS NULL
+ORDER BY chain_id, symbol;
+
+-- name: SearchAssetsByName :many
+SELECT * FROM assets
+WHERE name LIKE ? AND deleted_at IS NULL
+ORDER BY chain_id, name
+LIMIT ?;
+
+-- name: UpdateAsset :one
+UPDATE assets
+SET 
+    name = ?,
+    decimals = ?,
+    channel = ?,
+    asset_type = ?,
+    coingecko_id = ?,
+    updated_at = CURRENT_TIMESTAMP
+WHERE id = ? AND deleted_at IS NULL
+RETURNING *;
+
+-- name: SoftDeleteAsset :exec
+UPDATE assets
+SET deleted_at = CURRENT_TIMESTAMP
+WHERE id = ?;
+
+-- name: GetAssetByCoingeckoID :one
+SELECT * FROM assets
+WHERE coingecko_id = ? AND deleted_at IS NULL
+LIMIT 1;