Deposit capacity

# Headroom only
curl "https://app.robin.markets/api/v1/capacity"

# Will this batch fit? (amounts are 6-dec micro-units, aligned 1:1 with conditionIds)
curl "https://app.robin.markets/api/v1/capacity?conditionIds=0x1234…,0xabcd…&yesAmounts=1000000,0&noAmounts=0,2000000"

{
  "fits": false, // would the supplied batch deposit without reverting
  "remainingUsdc": "1234000000", // USDC the vault can still absorb; null = uncapped
  "binding": "internal", // which tier blocks the batch: "internal" | "external" | null
  "shortfallUsdc": "500000", // USDC the batch overshoots that tier by; "0" when it fits
  "markets": [
    {
      "conditionId": "0x1234…",
      "matchedUsdc": "0", // pairs against the pool now → consumes matched (external) capacity
      "unmatchedUsdc": "1500000", // raises the worst-case pairing exposure → consumes internal capacity
      "matchingSide": "no", // the side that would pair here; null when the pool is balanced
      "blocking": "unmatched", // "unmatched" | "matched" | null — lands in the tier that blocks the batch
      "overSide": "yes" // the side to reduce; null when this market isn't blocking
    }
  ]
}

struct VaultCapacity {
    uint256 remainingUsdc;       // USDC the vault can still absorb; type(uint256).max = uncapped
    bool    internalCheckEnabled;
    uint256 internalRemaining;   // max = uncapped or guard disabled
    uint256 externalRemaining;   // live ERC-4626 headroom; max = uncapped
}

enum MatchingSide { YES, NO, NONE }

struct DepositCapacity {
    bool           fits;
    uint256        internalShortfall;  // 0 when the internal tier isn't binding
    uint256        externalShortfall;  // 0 when the external tier isn't binding
    uint256[]      matchedUsdc;        // per market: pairs now → external (matched) capacity
    uint256[]      unmatchedUsdc;      // per market: added worst-case exposure → internal capacity
    MatchingSide[] matchingSide;       // per market: the side that pairs against the current surplus
    VaultCapacity  capacity;
}

/// Headroom only — no batch needed.
function getCapacity() external view returns (VaultCapacity memory);

/// Pre-flight a batch. Pass the WHOLE prospective batch — capacity is vault-wide.
function getDepositCapacity(
    bytes32[] conditionIds,
    uint256[] yesAmounts,
    uint256[] noAmounts
) external view returns (DepositCapacity memory);