Rebuild: phase 2's prober reads the probe queue

probe:run (compose service prober, PROBE_CONNECTIONS, default 6) claims
waiting candidates of settled releases (lone, then par2, then archive),
fetches each article with BODY over connections of its own (no
compression) and inspects it: the yEnc name and size, the content type
from the first bytes, a par2 set's files, a RAR volume's entries and
whether they're encrypted. Results per release and kind in
release_inspections (CHUNK_TABLESPACE, the HDD); on the release
passworded, inner_name (the largest content name) and inspected_at.
430 = missing, not yEnc = error, both final; connection trouble puts
the candidate back.

Fetch and parse in one process: an article takes ~0.1 s per connection,
parsing a few ms (no queue in between). Parsers from voyager 1 (lib/yenc,
lib/rar, lib/par2, lib/content sniff) with their tests; XoverClient.body;
yencode.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

package.json

@@ -70,7 +70,8 @@
     "luxon": "^3.7.2",
     "pg": "^8.23.1",
     "reflect-metadata": "^0.2.2",
-    "xmlbuilder2": "^4.0.3"
+    "xmlbuilder2": "^4.0.3",
+    "yencode": "^1.2.4"
   },
   "hotHook": {
     "boundaries": [