docs: add changeset

Author: solidsnakedev

.changeset/bitter-pets-pay.md

@@ -0,0 +1,51 @@
+---
+"@evolution-sdk/evolution": patch
+"@evolution-sdk/devnet": patch
+---
+
+### Added: Redeemer Labels for Script Debugging
+
+Added optional `label` property to redeemer operations (`collectFrom`, `withdraw`, `mint`, and stake operations) to help identify which script failed during evaluation.
+
+```typescript
+client.newTx()
+  .collectFrom({
+    inputs: [utxo],
+    redeemer: makeSpendRedeemer(999n),
+    label: "coordinator-spend-utxo"  // Shows in failure output
+  })
+  .withdraw({
+    stakeCredential,
+    amount: 0n,
+    redeemer: makeWithdrawRedeemer([999n]),
+    label: "coordinator-withdrawal"
+  })
+```
+
+When scripts fail, the `EvaluationError` now includes a structured `failures` array:
+
+```typescript
+interface ScriptFailure {
+  purpose: "spend" | "mint" | "withdraw" | "cert"
+  index: number
+  label?: string           // User-provided label
+  redeemerKey: string      // e.g., "spend:0", "withdraw:0"
+  utxoRef?: string         // For spend failures
+  credential?: string      // For withdraw/cert failures
+  policyId?: string        // For mint failures
+  validationError: string
+  traces: string[]
+}
+```
+
+### Added: Stake Operations
+
+Full support for Conway-era stake operations:
+
+- `registerStake` - Register stake credential (RegCert)
+- `deregisterStake` - Deregister stake credential (UnregCert)
+- `delegateTo` - Delegate to pool and/or DRep (StakeDelegation, VoteDelegCert, StakeVoteDelegCert)
+- `registerAndDelegateTo` - Combined registration + delegation (StakeRegDelegCert, VoteRegDelegCert, StakeVoteRegDelegCert)
+- `withdraw` - Withdraw staking rewards (supports coordinator pattern with amount: 0n)
+
+All operations support script-controlled credentials with RedeemerBuilder for deferred redeemer resolution.