stablecoins.core.balances_daily table gives a daily forward-filled balance snapshot for every address holding a tracked stablecoin, across EVM-compatible chains, Tron, and Solana. This table is new — there is no legacy crosschain.stablecoin.* equivalent.
On EVM-compatible chains and Tron, the grain is (date, address, token_address) and token_account is null. On Solana, the grain is (date, address, token_account, mint) — token_account is the SPL token account holding the balance, and mint is normalized into token_address.
Unique Key: chain, date, address, token_address (EVM/Tron); chain, date, address, token_account (Solana)