fix: resolve PostgreSQL type mismatches and add willexecutor debug logging

- Fix get_next_address_index: use try_get::<i32> for PG SERIAL/INTEGER columns
- Fix search_tx: use try_get::<i32> for PG status column
- Fix execute_insert: parse locktime (String→i64) and in_vout (String→i32)
  before binding to PG INTEGER columns
- Fix execute_insert: bind tbl_out vout as i32, amount as String for PG
- Fix save_new_address: cast xpub i64 to i32 for PG INTEGER column
- Fix get_pending_txs: cast i64 bind params to i32, use try_get::<i32> for reads
- Fix get_stats: use try_get::<i32> for all numeric PG INTEGER columns
- Add trace logging in parse_request_transactions for xpub address matching
- Add trace logging in get_all_addresses_by_xpub for query debugging

test

@@ -0,0 +1,30 @@
+{
+  "amount": -0.00050000,
+  "fee": -0.00000141,
+  "confirmations": 0,
+  "trusted": false,
+  "txid": "931dd22dca06fee28c0bdeb404ce055bbd4250c5a2ea0f9dee1d43def1838e0e",
+  "wtxid": "87c53a3f39a8874c4a70b65108f81c9899f199d79e378ce254198aaf25b185e6",
+  "walletconflicts": [
+  ],
+  "mempoolconflicts": [
+  ],
+  "time": 1747802029,
+  "timereceived": 1747802029,
+  "bip125-replaceable": "yes",
+  "details": [
+    {
+      "address": "bcrt1qh2c83yulvs7kgw0g6q3lkxqws4cnf0uxpcgcpt",
+      "category": "send",
+      "amount": -0.00050000,
+      "vout": 1,
+      "fee": -0.00000141,
+      "abandoned": false
+    }
+  ],
+  "hex": "02000000000101f54628aceb97a6140c5266ae6367c22db0e451c5683ef67455f99c2a92f6fece0000000000fdffffff02a3b8804a00000000160014fc2a81aebc081721099e0f394b82736f6651535650c3000000000000160014bab078939f643d6439e8d023fb180e857134bf8602473044022055da1e26c408892a5c8e1ac04fd7e1ce7a2fbd92ee10d977228a845423073d6402200f05d658ebf3a64e2f33e59a1378aa4f3966381917437b3a7627698f332b3c97012102614ec7c018916f137ea4137a05c328c1c0b6cc9ffb6b7a7aca249bff15124ceaa7010000",
+  "lastprocessedblock": {
+    "hash": "469ae576ee05edae3fe7dfc800f24d61165759f4ac57415adc5b14afcdf4a9ff",
+    "height": 423
+  }
+}