Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

MessageQueue: capped HTTP 429 retries, circuit breaker (CLOSED/OPEN/HALF_OPEN) with operator-visible trip logging, dead-letter logging on exhaustion, bounded queue with drop-oldest overflow, enqueue() bool backpressure signal, and health_fields() / depth() for /health (merged via _mq_health_fields() on /health). Thread-safe breaker state, safe Retry-After parsing, and redacted MQ logs.
Config: mq_max_retries, mq_circuit_breaker_threshold, mq_circuit_breaker_cooldown_seconds, mq_max_size.
Discriminated ISO probe cycle outcomes (CycleResult: success / empty / failed) with distinct logging and /health fields (last_cycle_status, last_cycle_error).
Atomic SchedulerSnapshot for /health scheduler extras (last_updated, poll_count, probe stats) published under a lock from Scheduler.health_snapshot().
Post the same Slack status summary as the interactive command to NOTIFICATION_CHANNEL once when the process starts (when that channel is configured).
Open-source hygiene: contributing guide, security policy, code of conduct, onboarding and handoff docs, pre-commit (Ruff), GitHub issue templates, Dependabot, CodeQL, CODEOWNERS template, and .gitattributes.

Documentation: deployment URLs (Slack Request URL behind nginx /paperscout/), clone URL in server setup, staging-style placeholders.
db-backup.yml: matrix parallel backups for staging / production using environment-level SSH secrets; uploads under gs://insights-db-backups/paperscout/<environment>/ with unique temp files and object keys (UTC timestamp + run_id + run_attempt + environment); EXIT trap removes temp dump on failure. SERVER_SETUP restore examples updated (--no-owner, listing/copy by object name).
cd.yml: validate DEPLOY_PATH, DEPLOY_BRANCH, and HEALTH_PORT GitHub Environment variables before SSH so missing HEALTH_PORT fails with a clear error instead of curling http://localhost:/health.

Initial public release as tracked in pyproject.toml (WG21 paper tracking, Slack integration, PostgreSQL storage, Docker deploy, CI/CD workflows).