fix: wire missing types, keys, events and fields from merged PRs

- Added PenaltyTier contracttype struct (Vec<(u64,u32)> unsupported by contracttype)
- Split admin_frozen from InvoiceExt (at 40-field limit) into InvoiceExt2
- Added penalty_tiers, allowed_callers, refund_grace_secs to InvoiceExt
- Added require_kyc, scheduled_release_at to InvoiceOptions
- Added donate_on_failure to Payment; wired through pay() → _pay()
- Added 8 new event functions (nft_gate_set, timelock, admin freeze, etc.)
- Added missing helper fns: pay_shard_key, compute_shard_id, require_admin, etc.
- Fixed symbol_short!("fee_waivers") → "fee_wvrs" (max 9 chars)
- Fixed ed25519_verify: convert BytesN<32> → Bytes for message arg
- Fixed test nonce (per-payer not global) and shard key name ("pay_sh")
- All 151 tests pass

Author: Kingsman-99

contracts/split/src/events.rs

@@ -186,3 +186,59 @@ pub fn pending_payout_claimed(env: &Env, invoice_id: u64, recipient: &Address, a
         (recipient.clone(), amount),
     );
 }
+
+pub fn nft_gate_set(env: &Env, contract: &Option<Address>, admin: &Address) {
+    env.events().publish(
+        (symbol_short!("split"), symbol_short!("nft_set")),
+        (contract.clone(), admin.clone()),
+    );
+}
+
+pub fn action_queued(env: &Env, action_id: u64, action: &TimelockAction, admin: &Address) {
+    env.events().publish(
+        (symbol_short!("split"), symbol_short!("tl_queue"), action_id),
+        (action.clone(), admin.clone()),
+    );
+}
+
+pub fn action_executed(env: &Env, action_id: u64, action: &TimelockAction) {
+    env.events().publish(
+        (symbol_short!("split"), symbol_short!("tl_exec"), action_id),
+        action.clone(),
+    );
+}
+
+pub fn action_cancelled(env: &Env, action_id: u64, action: &TimelockAction, admin: &Address) {
+    env.events().publish(
+        (symbol_short!("split"), symbol_short!("tl_cncl"), action_id),
+        (action.clone(), admin.clone()),
+    );
+}
+
+pub fn invoice_admin_frozen(env: &Env, invoice_id: u64, admin: &Address, reason: &String) {
+    env.events().publish(
+        (symbol_short!("split"), symbol_short!("adm_frz"), invoice_id),
+        (admin.clone(), reason.clone()),
+    );
+}
+
+pub fn invoice_admin_unfrozen(env: &Env, invoice_id: u64, admin: &Address) {
+    env.events().publish(
+        (symbol_short!("split"), symbol_short!("adm_unf"), invoice_id),
+        admin.clone(),
+    );
+}
+
+pub fn batch_archived(env: &Env, count: u32, ids: &Vec<u64>) {
+    env.events().publish(
+        (symbol_short!("split"), symbol_short!("bat_arc")),
+        (count, ids.clone()),
+    );
+}
+
+pub fn partial_refund_issued(env: &Env, invoice_id: u64, creator: &Address, bps: u32, amount: i128) {
+    env.events().publish(
+        (symbol_short!("split"), symbol_short!("prt_ref"), invoice_id),
+        (creator.clone(), bps, amount),
+    );
+}