v5.9.24: update TRI home + explorer links, networking fixes, checkpoint publisher

- qt: TRI home → https://cryptographic-triangles.org/ (UI + 65 locales)
- qt: block explorer → https://blocks.cryptographic-triangles.org (65 locales)
- net: networking hardening + checkpoint publisher support
- build: MinGW cross-compilation toolchain, CI tridock rebuild trigger
- test: checkpoint publisher + onion v3 test updates
- test: chaindb equivalence test suite (LevelDB↔RocksDB migration parity)
- util: expose ResetDataDirCache() for test fixture datadir switching
- txdb: WriteRawPublic/ReadRawPublic test seam for raw byte-level access
- version bump 5.9.23 → 5.9.24

.gitignore

@@ -88,3 +88,15 @@ bench-results.csv
 /build-latest/
 /build-bench/
 /.qmake.stash
+
+# MinGW cross-compilation deps (local build environment)
+/deps-mingw/
+
+# Snapshot files
+*.utx
+
+# Merge artifacts
+*.orig
+
+# Dev patches
+*.patch