Enables career-total aggregation by real-world player identity (SbaPlayer)
across all seasons. JOINs StratPlay → Player to access Player.sbaplayer FK,
groups by that FK, and excludes players with null sbaplayer. Also refactors
stratplay router from single file into package and adds integration tests.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Enables cross-season stat queries by MLB player identity (SbaPlayer) without
requiring callers to look up every season-specific Player ID first. Filters
via Player subquery since StratPlay has no direct FK to SbaPlayer.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>