docs: add Bugbot resolve-and-reply team norm to .cursor/BUGBOT.md

[LukasWodka]

Appends the team norm for Bugbot findings to .cursor/BUGBOT.md: every review thread gets a reply (fixed, or false positive with evidence), then gets resolved.
Also adds a two-line pointer to the norm in CONTRIBUTING.md.

Part of tracebloc/backend#1308

🤖 Generated with Claude Code

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Note

Low Risk
Documentation-only; no runtime, CI, or release behavior changes in this repo.

Overview
Adds a Working with Bugbot findings (team norm) section to .cursor/BUGBOT.md: each review thread needs a reply (Fixed with commit, or False positive with evidence), then resolution. It also states that unresolved Cursor threads block release-train promotions (soft gate across the fleet).

CONTRIBUTING.md gets a short Bugbot findings section that points contributors to that norm.

^{Reviewed by Cursor Bugbot for commit 15d2c38. Bugbot is set up for automated code reviews on this repo. Configure here.}

[LukasWodka]

👋 Heads-up — Code review queue is at 41 / 30

Above the WIP limit. The team convention is to review existing PRs before opening new work.

Open PRs currently in Code review (oldest first):

• averaging-service#219 — release-train: develop -> staging · author: @LukasWodka · no reviewer assigned
• averaging-service#220 — ci: code-quality caller (advisory) · author: @LukasWodka · no reviewer assigned
• backend#1201 — docs(rfc): Data spaces & federated dataset composition (draft) · author: @LukasWodka · reviewer: @saadqbal
• backend#1217 — docs(rfc): Dataset integrity & score reproducibility (draft) · author: @LukasWodka · reviewer: @saadqbal
• backend#1261 — RFC-BACKEND-0008: board & process reset (decision RFC — for markup) · author: @LukasWodka · reviewer: @saadqbal
• backend#1284 — docs(deploy): backend deploy runbook skeleton (#1263) · author: @LukasWodka · no reviewer assigned
• backend#1293 — fix(heartbeat): tolerate unknown experiment_key in training_info (#1287) · author: @divyasinghds · no reviewer assigned
• backend#1297 — feat(db): gate MSSQL-only ODBC driver per engine + add psycopg (#1164) · author: @saadqbal · no reviewer assigned
• backend#1298 — fix(guardrails): reuse existing dimensional anomaly monitor (#1160) · author: @saadqbal · no reviewer assigned
• backend#1299 — release-train: develop -> staging · author: @LukasWodka · reviewer: @saadqbal

Pull from review before opening new work. (This is a nudge from the kanban WIP check, not a block.)

[LukasWodka]

bugbot run

[cursor]

✅ Bugbot reviewed your changes and found no new issues!

Comment @cursor review or bugbot run to trigger another review on this PR

^{Reviewed by Cursor Bugbot for commit 15d2c38. Configure here.}