[Split Tracking] End-to-end testing and regression verification

[joelhalen]

Overview

Part of #28 — Split GP Tracking feature.

Once all implementation sub-issues are complete, this tracks end-to-end verification to ensure the feature works correctly and that groups without split tracking are unaffected.

Verification Checklist

Happy Path

• Submit a drop via webhook with players_included containing valid group members for a group with split_gp_tracking = 1.
  • drop_splits table has one row per non-receiver participant.
  • leaderboard:{partition}:group:{group_id} sorted set scores receiver and each participant equally at split_value.
  • Global leaderboard:{partition} score for receiver is unchanged (full total_value).
  • player:{id}:{partition}:total_loot for receiver is unchanged.

Entry Modifier — Edit Value

• Use "Modify Entry" → "Edit Value" on a split drop. Confirm DropSplit rows are updated and group leaderboard scores reflect the new split_value for all participants.

Entry Modifier — Modify Splits

• Use "Modify Entry" → "Modify Splits" to add a new participant. Confirm new DropSplit row created, group leaderboard score added for new participant, recalculated for existing ones.
• Remove all split participants. Confirm DropSplit rows deleted, receiver's group leaderboard score restored to full_value.

Entry Modifier — Delete

• Delete a split drop via context menu. Confirm all DropSplit rows deleted and all participant group leaderboard scores corrected.

Entry Modifier — Hide / Unhide

• Hide a split drop. Confirm split participant leaderboard scores are removed. Confirm DropSplit rows are preserved.
• Unhide the same drop. Confirm split credits are re-applied correctly.

Force Rebuild

• Call force_update_player() for a split participant (not the receiver). Confirm their group leaderboard score is rebuilt correctly from drop_splits.

Regression — Non-split Groups

• Submit a drop for a group without split_gp_tracking. Confirm no DropSplit rows are written and leaderboard behaviour is identical to before this feature.

Toggle Command

• Run /toggle-split-tracking in a Discord server linked to a group. Confirm config key is written and the ephemeral confirmation message shows the correct new state.