style(gates): clear clippy::ignored_unit_patterns + doc-markdown on G7/G11

The nine `#[ignore]`-marked gate stubs do not need a body; drop the
`let _ = ();` placeholder. Backtick `RocksDB` in the G7 / G11 doc
headers to satisfy clippy::doc_markdown.

Op: compress

Author: metaphorics

bin/bitcoin-rs/tests/gates/g01_headers_only_sync.rs

@@ -11,5 +11,4 @@
 #[ignore = "requires live bitcoind mainnet RPC for cross-check"]
 fn headers_only_sync_parity() {
     // Compare bitcoin-rs headers-only mainnet block hashes to bitcoind getblockhash for 0..tip.
-    let _ = ();
 }

bin/bitcoin-rs/tests/gates/g02_ibd_muhash_parity.rs

@@ -11,5 +11,4 @@
 #[ignore = "requires full IBD + bitcoind gettxoutsetinfo cross-check"]
 fn full_ibd_utxo_root_parity_muhash() {
     // Compare sampled bitcoin-rs coinstats muhash values to bitcoind gettxoutsetinfo during IBD.
-    let _ = ();
 }

bin/bitcoin-rs/tests/gates/g03_kernel_parity.rs

@@ -11,5 +11,4 @@
 #[ignore = "requires kernel feature + 100k mainnet blocks"]
 fn kernel_parity_gate() {
     // Validate each block through bitcoin-rs consensus and bitcoinkernel, then compare verdicts.
-    let _ = ();
 }

bin/bitcoin-rs/tests/gates/g04_consensus_vectors.rs

@@ -11,5 +11,8 @@ fn consensus_test_vectors() {
         .args(["test", "-p", "bitcoin-rs-consensus", "--no-fail-fast"])
         .status()
         .expect("spawn cargo");
-    assert!(status.success(), "consensus crate tests must pass — these include tx_valid.json, tx_invalid.json, script_tests.json, sighash.json");
+    assert!(
+        status.success(),
+        "consensus crate tests must pass — these include tx_valid.json, tx_invalid.json, script_tests.json, sighash.json"
+    );
 }

bin/bitcoin-rs/tests/gates/g05_electrum_parity.rs

@@ -11,5 +11,4 @@
 #[ignore = "requires reference electrs build + shared chain"]
 fn electrum_protocol_parity() {
     // Diff bitcoin-rs electrum responses against reference electrs for the documented method set.
-    let _ = ();
 }

bin/bitcoin-rs/tests/gates/g06_snapshot_roundtrip.rs

@@ -12,5 +12,4 @@
 #[ignore = "requires populated UTXO set; covered by `crates/utxo` unit tests for the in-memory path"]
 fn snapshot_round_trip() {
     // Dump and reload a populated UTXO snapshot, then compare UTXO and coinstats roots.
-    let _ = ();
 }

bin/bitcoin-rs/tests/gates/g07_storage_equivalence.rs

@@ -1,5 +1,5 @@
 //! G7 — Storage-backend equivalence.
-//! **G7 — Storage-backend equivalence.** RocksDB, MDBX (`signet-libmdbx`), fjall, and redb backends all pass G1–G6 with identical chain results. `cargo bench --bench kvstore_backends` reports throughput + p99 latency for all four in `target/bench-report.md`. **Backend promotion rule:** if MDBX wins by ≥15 % on UTXO-commit p95 AND matches RocksDB on Electrum-history p95, MDBX becomes the new default in the next minor release and the change is documented in the ultrareview log.
+//! **G7 — Storage-backend equivalence.** `RocksDB`, MDBX (`signet-libmdbx`), fjall, and redb backends all pass G1–G6 with identical chain results. `cargo bench --bench kvstore_backends` reports throughput + p99 latency for all four in `target/bench-report.md`. **Backend promotion rule:** if MDBX wins by ≥15 % on UTXO-commit p95 AND matches `RocksDB` on Electrum-history p95, MDBX becomes the new default in the next minor release and the change is documented in the ultrareview log.
 
 #![allow(clippy::expect_used)]
 
@@ -11,5 +11,8 @@ fn storage_backend_equivalence() {
         .args(["test", "-p", "bitcoin-rs-storage", "--no-fail-fast"])
         .status()
         .expect("spawn cargo");
-    assert!(status.success(), "storage crate tests must pass — backend_equivalence.rs asserts 4-backend aggregate hash equivalence");
+    assert!(
+        status.success(),
+        "storage crate tests must pass — backend_equivalence.rs asserts 4-backend aggregate hash equivalence"
+    );
 }

bin/bitcoin-rs/tests/gates/g08_utreexo_parity.rs

@@ -11,5 +11,4 @@
 #[ignore = "requires --utreexo IBD against full-UTXO baseline"]
 fn utreexo_parity() {
     // Compare utreexo IBD tip and coinstats hash against the full-UTXO rocksdb baseline.
-    let _ = ();
 }

bin/bitcoin-rs/tests/gates/g09_wallet_psbt_roundtrip.rs

@@ -13,5 +13,4 @@
 #[ignore = "requires every descriptor type + external signer fixture"]
 fn wallet_psbt_round_trip() {
     // Build, externally sign, finalize, and submit PSBTs for every documented descriptor family.
-    let _ = ();
 }

bin/bitcoin-rs/tests/gates/g10_reorg_deep.rs

@@ -8,8 +8,16 @@
 #[test]
 fn reorg_deep_test() {
     let status = std::process::Command::new(env!("CARGO"))
-        .args(["test", "-p", "bitcoin-rs-chain", "plans_deep_reorg_to_common_fork"])
+        .args([
+            "test",
+            "-p",
+            "bitcoin-rs-chain",
+            "plans_deep_reorg_to_common_fork",
+        ])
         .status()
         .expect("spawn cargo");
-    assert!(status.success(), "chain crate depth-100 reorg test must pass");
+    assert!(
+        status.success(),
+        "chain crate depth-100 reorg test must pass"
+    );
 }