Demote parse-level diagnostic logs that fire on every game interaction:
- TBC/Classic gossip, quest details, quest rewards: LOG_INFO → LOG_DEBUG
- WotLK gossip, quest details/reward/request-items: LOG_INFO → LOG_DEBUG
- Attack start/stop, XP gain, loot, name query, vendor, party: LOG_INFO → LOG_DEBUG
- TBC SMSG_UPDATE_OBJECT has_transport fallback: LOG_WARNING → LOG_DEBUG
- TBC parseAuraUpdate not-in-TBC diagnostic: LOG_WARNING → LOG_DEBUG
- Turtle SMSG_MONSTER_MOVE WotLK fallback: LOG_WARNING → LOG_DEBUG
These all fire multiple times per second during normal gameplay.