release notes for v4.16.0

Author: jpswinski

docs/rtd/source/developer_guide/release_notes/release-v04-16-00.md

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+# Release v.4.16.0
+
+2025-06-27
+
+Version description of the v.4.16.0 release of SlideRule Earth.
+
+## New/Improved Functionality
+
+* [3c4aa74](https://github.com/SlideRuleEarth/sliderule/commit/3c4aa74afe515b0306f77af9cec8d9effe8bc0fd) - `fields` parameter was added to the `output` parameters
+
+* PGC ArcticDEM Strips and REMA Strips now use PGC STAC endpoint
+
+* Rate limiting implemented on public cluster.  When a request location (defined as the registered location for the source IP address of the client originating the request) exceeds 100K granules processed in a given week, then IPs from that location are rate limited to processing 1 granule per minute for the rest of the week.  Requests that are rate limited are responded to with a 429 HTTP code and a corresponding `retry-after` header.
+
+* [aba56e5](https://github.com/SlideRuleEarth/sliderule/commit/aba56e58f64a97427a03df936e24d358f32e582d) and [#563](https://github.com/SlideRuleEarth/sliderule-web-client/issues/563) - added `assets` endpoint
+
+## Issues Resolved
+
+* [e238acd](https://github.com/SlideRuleEarth/sliderule/commit/e238acd92d1745862325d2a96949a342e62b5250) - clarified confusing version mismatch warning
+
+## Development Changes
+
+* Pytests that depend on external services (CMR, STAC, TNM) are marked as such and do not cause a CI/CD pipeline failure.
+
+* The _Usage Report_ now includes the time span over which the data is being summarized.
+
+* Added node.js tests that simulate the browser environment to catch potential issues with browser compatibility
+
+* Exposed `/discovery/status` endpoint to the web client (worked out CORS headers)
+
+* [6d58b0d](https://github.com/SlideRuleEarth/sliderule/commit/6d58b0d106febc306b749123335a6c73b8e13ea5) - notebooks rendered as part of building the static website
+
+* On startup, attempt is made to download the leap seconds file from NIST and use it instead of the one checked into the repository
+
+## Getting This Release
+
+[https://github.com/SlideRuleEarth/sliderule/releases/tag/v.4.16.0](https://github.com/SlideRuleEarth/sliderule/releases/tag/v.4.16.0)
+
+## Benchmarks
+> clients/python/utils/benchmark.py
+```
+```
+
+## Baseline
+> clients/python/utils/baseline.py
+:::{note}
+:::