Standardize Redis Key Prefix for User Lineage Context

[tsdk02]

Currently, the lineage context is cached in Redis using tenant-specific key prefixes (public_, public_v2_). This causes inconsistencies across V1 and V2 environments — especially during login/logout flows — as lineage context data becomes deployment-specific.

Need to introduce a new Redis connection helper that overrides the prefix with the global value from config (global).