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>

types/yencode.d.ts

@@ -0,0 +1,15 @@
+declare module 'yencode' {
+  export function decode(data: Buffer, stripDots?: boolean): Buffer
+  export function encode(data: Buffer, lineSize?: number, column?: number): Buffer
+  /** Returns the CRC32 as a 4-byte big-endian buffer. */
+  export function crc32(data: Buffer, initial?: Buffer): Buffer
+  /** CRC32 of A+B from crc(A), crc(B) and the length of B. */
+  export function crc32_combine(crc1: Buffer, crc2: Buffer, len2: number): Buffer
+  const yencode: {
+    decode: typeof decode
+    encode: typeof encode
+    crc32: typeof crc32
+    crc32_combine: typeof crc32_combine
+  }
+  export default yencode
+}