refactor: correct debugLevel and debugCategory on 56 parser event classes

Verified all event metadata against official Salesforce documentation
 (S1: developer docs, S2: help.salesforce.com) and live org data (S3).

Level corrections (53 events):

- 25 WF\_\* events: Fine → Info
- 8 FLOW detail events: Fine → Finer
- 5 FLOW/EVENT_SERVICE info events: Fine → Info
- 4 System events (MODE_ENTER/EXIT, TRACE_FLAGS): Debug → Info
- 4 Duplicate Detection/Match Engine events: Debug → Info
- 2 SLA events: Fine → Info
- 2 PUSH_NOTIFICATION events: Fine → Debug
- WF_FLOW_ACTION_DETAIL: Finer → Fine
- LIMIT_USAGE_FOR_NS: Error → Finest
- XDS_RESPONSE_ERROR: Info → Error

Category corrections (3 events):

- VF_APEX_CALL_START: ApexCode → Visualforce (empirically verified)
- LIMIT_USAGE_FOR_NS: NBA → ApexProfiling
- XDS_RESPONSE_ERROR: System → Callout
- VF_SERIALIZE/DESERIALIZE_CONTINUATION_STATE: ApexCode → Visualforce

Author: lukecotter