refactor(lana): use Salesforce Services

[peternhale]

PR overview

Stack 1 of 4. Replaces direct Salesforce SDK integration with Salesforce Services while preserving the desktop extension.

Changes made

• Initialize and dispose the shared Salesforce Services runtime with the extension.
• Retrieve Apex log records and bodies through ApexLogService.
• Cache retrieved bodies through FsService without blocking analysis when caching is unavailable.
• Remove the legacy Salesforce connection helpers and Pino worker-path workaround.
• Declare Salesforce Services as a required extension dependency.

Type of change

• Refactor
• Chore

Related issues

related W-23939830

Validation

• pnpm typecheck
• RetrieveLogFile unit suite: 15 tests