Release v1.2.1

• Rollback debounce cache on delivery failure: if Amazon API or network fails, the message is unblocked so subsequent retries succeed immediately.
• Prevent startup crash (ValueError) when optional numeric environment variables are left empty in .env (DEFAULT_EXPIRY_HOURS="", DEBOUNCE_SECONDS="").
• Concurrency protection: thread-safe asyncio.Lock in TokenCache to prevent duplicate OAuth2 token requests during concurrent notifications.
• Validation hardening: reject NaN and Infinity values in Pydantic models (allow_inf_nan=False).
• Memory bound in DebounceFilter: enforce _max_entries limit by pruning oldest entry when the cache is full.
• Home Assistant Watchdog: enable native HA supervisor watchdog monitoring on /health endpoint.
• Add-on schema alignment: adjust minimum default_expiry_hours to 0.1 (6 min) to prevent out-of-bounds warnings on startup.
• Robust Bashio parsing: use bashio::config.has_value in run.sh to prevent empty fields exporting literal "null" strings.
• Pure Python Uvicorn: switch to uvicorn (without [standard] C-extensions) to ensure reliable multi-arch builds on Alpine Linux (armv7/armhf).
• CI/CD synchronization check: automated CI check ensuring standalone and add-on files remain strictly identical.

Release v1.2.0

• Automatic message truncation: messages exceeding Amazon's 256-character limit are automatically truncated to 253 characters + ... with warning logs, ensuring notifications are never dropped.
• In-memory anti-duplicate debounce filter: ignore identical consecutive notifications within a configurable time window (debounce_seconds, default: 0 / disabled) to prevent repeating alerts from bouncing sensors.
• Fix validation error handling: strip non-serializable exception objects from Pydantic error contexts to ensure validation failures return HTTP 422 instead of 500.
• Automated test suite: 20 unit tests with mocked Amazon APIs for fast and isolated verification.
• CI/CD workflow: GitHub Actions pipeline running test suite and validating Docker builds for both standalone and add-on images on every push and PR.

Release v1.1.1

• Automatically clamp notification expiry between 5 minutes and 24 hours (Amazon's allowed limits) with clear warning logs when adjusted.
• Auto-recovery: refresh expired access tokens automatically on 401 errors and retry.
• Enhanced /notify response: now includes reference_id and effective expiry_hours.
• Enhanced /history: added optional ?limit=N query parameter.
• Home Assistant integration: updated rest_command and UI script examples to support expiry_hours.

Release v1.1.0

• Configurable notification expiry: default 24h (was 1h), adjustable globally or per request via expiry_hours.
• Automatic retry on transient Amazon API errors (1 retry after 2s delay).
• New /history endpoint: returns the last 50 sent notifications (in-memory).

Release v1.0.2

• Add custom AppArmor profile to elevate security rating to 6.

Release v1.0.1

• Fix s6-overlay-suexec PID 1 error by setting init: false in add-on configuration.
• Enforce LF line endings for shell scripts.

Release v1.0.0

• Initial release as Home Assistant add-on
• Configuration via Home Assistant UI (credentials, region, API key, log level)
• Support for NA, EU and FE Amazon regions
• Optional API key protection for the /notify endpoint
• Configurable log level
• Rate limiting (10 requests per 10-second window)