Fix Transaction destructor exception-safety

The destructor caught only SQLite::Exception, so a std::bad_alloc thrown
while building the "ROLLBACK TRANSACTION" string (or any other non-SQLite
exception) escaped the implicitly noexcept destructor and called
std::terminate. Broaden the handler to catch(...), matching the Savepoint
fix (afa51d3).

Fixes TXN-08 from the code review.

Author: SRombauts

CHANGELOG.md

@@ -310,3 +310,4 @@ Version 3.4.0 - 2026 ???
 - Restore the Coverity Scan static analysis as a GitHub Actions workflow, replacing the old Travis CI job
 - Fix Database::getHeaderInfo() signed-shift UB and use fixed-width types for the Header struct (#558)
 - Fix Savepoint destructor to catch all exceptions and track rollback state to avoid std::terminate (#559)
+- Fix Transaction destructor to catch all exceptions to avoid std::terminate (#559)

src/Transaction.cpp

@@ -55,7 +55,7 @@ Transaction::~Transaction()
         {
             mDatabase.exec("ROLLBACK TRANSACTION");
         }
-        catch (SQLite::Exception&)
+        catch (...)
         {
             // Never throw an exception in a destructor: error if already rollbacked, but no harm is caused by this.
         }