Audio source-pool census + fix the unbuilt jam-log literal

Field report (playtest night + operator): audio cutting in and out
toward the end of the match -- the classic shape of source-pool
pressure (sources release only at entity teardown; long matches
accumulate looping occupants like wreck burn/smoke until transients
lose the voice fight; OpenAL mixing capacity is finite).  L4AUDRND now
tracks live/deleted/failed sources: a 30s '[audio] source census' line
plus an ALWAYS-logged line on every acquisition failure (the smoking
gun).  Soak test next to confirm the leak/occupation slope.

Also: the ffa3933 jam-entry log had a raw newline in a string literal
(committed unbuilt -- process violation, caught by this build).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

game/reconstructed/projweap.cpp

@@ -714,8 +714,7 @@ void
 						DEBUG_STREAM << "[weap] " << GetName() << " JAMMED (T="
 							<< currentTemperature << "/" << failureTemperature
 							<< " heatAlarm=" << (int)heatAlarm.GetLevel()
-							<< ") -- permanent until mission end
-" << std::flush;
+							<< ") -- permanent until mission end\n" << std::flush;
 						weaponAlarm.SetLevel(JammedState);	// @4bbf34 -> 5
 					}
 					else