fix: Remove fatal assertion on Linux thread name truncation (#6690)

src/libxrpl/beast/core/CurrentThreadName.cpp

@@ -119,11 +119,6 @@ setCurrentThreadNameImpl(std::string_view name)
         std::cerr << "WARNING: Thread name \"" << name << "\" (length "
                   << name.size() << ") exceeds maximum of "
                   << maxThreadNameLength << " characters on Linux.\n";
-
-        XRPL_ASSERT(
-            false,
-            "beast::detail::setCurrentThreadNameImpl : Thread name exceeds "
-            "maximum length for Linux");
     }
 #endif
 }

src/xrpld/app/ledger/Ledger.cpp

@@ -1031,7 +1031,7 @@ pendSaveValidated(
     if (!isSynchronous &&
         app.getJobQueue().addJob(
             isCurrent ? jtPUBLEDGER : jtPUBOLDLEDGER,
-            std::to_string(ledger->seq()),
+            "Pub" + std::to_string(ledger->seq()),
             [&app, ledger, isCurrent]() {
                 saveValidatedLedger(app, ledger, isCurrent);
             }))

src/xrpld/app/ledger/OrderBookDB.cpp

@@ -67,9 +67,12 @@ OrderBookDB::setup(std::shared_ptr<ReadView const> const& ledger)
             update(ledger);
         else
         {
+            // Shorten job name to fit Linux 15-char thread name limit with "j:"
+            // prefix "OB" + seq (max 9 digits) = 11 chars, + "j:" = 13 chars
+            // (fits in 15)
             app_.getJobQueue().addJob(
                 jtUPDATE_PF,
-                "OBUpd" + std::to_string(ledger->seq()),
+                "OB" + std::to_string(ledger->seq() % 1000000000),
                 [this, ledger]() { update(ledger); });
         }
     }