[sentry] Whitelist stack locals
[sentry] Whitelist stack locals

Summary: Stack locals contain valuable debugging information. Keep some of them which are not PII (so far, only `account_id`).

Test Plan: Triggered an exception, tested that locals got stripped.

Reviewers: dlitz, emfree

Reviewed By: emfree

Projects: #sync-engine

Differential Revision: https://review.inboxapp.com/D546

Eagles2F/sync-engine,EthanBlackburn/sync-engine,gale320/sync-engine,nylas/sync-engine,PriviPK/privipk-sync-engine,PriviPK/privipk-sync-engine,nylas/sync-engine,PriviPK/privipk-sync-engine,jobscore/sync-engine,gale320/sync-engine,jobscore/sync-engine,wakermahmud/sync-engine,PriviPK/privipk-sync-engine,nylas/sync-engine,Eagles2F/sync-engine,closeio/nylas,ErinCall/sync-engine,gale320/sync-engine,wakermahmud/sync-engine,EthanBlackburn/sync-engine,gale320/sync-engine,jobscore/sync-engine,PriviPK/privipk-sync-engine,ErinCall/sync-engine,closeio/nylas,EthanBlackburn/sync-engine,Eagles2F/sync-engine,nylas/sync-engine,ErinCall/sync-engine,wakermahmud/sync-engine,wakermahmud/sync-engine,EthanBlackburn/sync-engine,EthanBlackburn/sync-engine,ErinCall/sync-engine,ErinCall/sync-engine,closeio/nylas,jobscore/sync-engine,closeio/nylas,Eagles2F/sync-engine,gale320/sync-engine,wakermahmud/sync-engine,Eagles2F/sync-engine