fix(server): migrate PaperDownloader to PaperMC v3 (fill) API - #429
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PaperMC sunset the v2 API (api.papermc.io/v2); it now returns HTTP 410,
so `server add paper <version>` fails and the server integration test
(runServerIntegrationTest) and server-test jobs break on every branch:
java.io.IOException: Failed to get
https://api.papermc.io/v2/projects/paper/versions/1.21/, response 410:
{"ok":false,"error":"sunset", ...}
Switch to the current v3 "fill" API (fill.papermc.io/v3). Two shape changes
versus v2: the builds endpoint returns a top-level array ordered newest-first
(v2 was an object with a builds array, oldest-first), and each build carries a
ready-made download url under downloads."server:default".url, so the jar URL no
longer needs to be templated. Verified against the live API: the latest-build
path and an explicit-build lookup both resolve to a valid server jar.
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PaperMC sunset the v2 API (api.papermc.io/v2); it now returns HTTP 410, so
server add paper <version>fails and the server integration test (runServerIntegrationTest) and server-test jobs break on every branch:Switch to the current v3 "fill" API (fill.papermc.io/v3). Two shape changes versus v2: the builds endpoint returns a top-level array ordered newest-first (v2 was an object with a builds array, oldest-first), and each build carries a ready-made download url under downloads."server:default".url, so the jar URL no longer needs to be templated. Verified against the live API: the latest-build path and an explicit-build lookup both resolve to a valid server jar.