feat(moq-gst): moqsrc follows a restart on the same pads

doc/bin/gstreamer.md

@@ -104,8 +104,13 @@ rewound timestamps forward.
 Pads are named by kind and appear as the catalog announces renditions:
 `video_0`, `video_1`, `audio_0`. Link the pad you want by name; the terse
 `moqsrc ! decodebin3` form links only the first pad offered, which may be
-audio. Each pad sends EOS when its rendition ends. A rendition that leaves the
-catalog keeps its pad until its track ends, while one whose format changes is
-replaced by a new pad. Properties: `url`, `broadcast`, `tls-disable-verify`.
+audio. `moqsrc` follows the broadcast's announcements: when the publisher
+restarts, it switches to the new broadcast on the same pads, kept by rendition
+name, so a pipeline linked by name keeps playing. A format change keeps its pad
+too, with new caps downstream must accept. A rendition that leaves the catalog
+gets EOS once its track ends. A broadcast that ends or loses its publisher holds
+its pads without EOS until it is announced again, so the pipeline does not end
+on its own; losing the relay connection posts an error. Properties: `url`,
+`broadcast`, `tls-disable-verify`.
 
 Debug with `GST_DEBUG=*:4` for GStreamer and `RUST_LOG=debug` for the plugin.

quest/m0/broadcast-epoch/README.md

@@ -110,5 +110,4 @@ maintainer's pre-release merge of `release` into `main` keeps `main`'s
 - [Export ts](/quest/m0/broadcast-epoch/export-ts.md) - `export ts` and SRT egress linger only for the same epoch, and switch to a replacement only with `--stitch`, as a full program switch
 - [Publish catalog restart](/quest/m0/broadcast-epoch/publish-catalog-restart.md) - `@moq/publish` never reuses catalog group numbers under one name and epoch after a re-announce
 - [Bindings](/quest/m0/broadcast-epoch/bindings.md) - moq-ffi and every wrapper expose the epoch and let a publisher announce one
-- [moqsrc](/quest/m0/broadcast-epoch/moqsrc.md) - moqsrc switches to the new broadcast on a `Restart`, keeping its pads by rendition name
 - [Stats totals and prefix tracks](/quest/m0/broadcast-epoch/stats-split.md) - the same release retires the per-path stats maps for totals and on-demand prefix tracks (decided 2026-10-05)

rs/moq-gst/Cargo.toml

@@ -20,6 +20,7 @@ anyhow = { workspace = true, features = ["backtrace"] }
 bytes = { workspace = true }
 gst = { package = "gstreamer", version = "0.23" }
 hang = { workspace = true }
+moq-json = { workspace = true }
 moq-mux = { workspace = true }
 moq-net = { workspace = true }
 moq-tokio = { workspace = true, default-features = true }