chore: replace vendor product name with generic ext_device throughout

- Rename _EXT_DEVICE_CODES → _EXT_DEVICE_CODES, gen_ext_device → gen_ext_device
- Rename corpus output directory ext_device/ → ext_device/
- Update default.yaml placeholder pattern name and description
- Update tests to match new directory and class names
- Corresponding Forgejo issue titles updated (#43, #44, #54)

patterns/default.yaml

@@ -211,10 +211,10 @@ patterns:
     domain: media
     description: Plex EasyAudioEncoder (EAC3 Dolby audio transcoder) crashed — service restart required
 
-  # - name: ext_device_device_error
+  # - name: ext_device_error
   #   pattern: "ERR-\d{4}"
   #   severity: ERROR
-  #   description: EXT_DEVICE device error code
+  #   description: vendor device structured error code
 
   # ── VPN / tunnel patterns ──────────────────────────────────────────────────
 

scripts/gen_corpus.py

@@ -12,7 +12,7 @@ Output tree:
     <out>/journald/system.jsonl   — systemd/kernel journald JSON
     <out>/docker/services.jsonl   — containerised app stdout
     <out>/qbittorrent/qbt.log     — hotio-format qBittorrent log
-    <out>/ext_device/device.log         — EXT_DEVICE device plaintext log
+    <out>/ext_device/device.log    — vendor device plaintext log
 """
 from __future__ import annotations
 
@@ -308,7 +308,7 @@ def gen_qbittorrent(path: Path, start: datetime, end: datetime, rng: random.Rand
 
 
 def gen_ext_device(path: Path, start: datetime, end: datetime, rng: random.Random, error_rate: float) -> int:
-    """Emit EXT_DEVICE device plaintext log (ISO timestamp + level + ERR/SYS/NET code + message)."""
+    """Emit vendor device plaintext log (ISO timestamp + level + ERR/SYS/NET code + message)."""
     lines = 0
     with path.open("w") as fh:
         for dt in _ts_seq(start, end, rng):

tests/test_gen_corpus.py

@@ -129,7 +129,7 @@ class TestQbittorrentFormat:
         assert severities <= {"INFO", "WARN", "CRITICAL"}
 
 
-# ── EXT_DEVICE format ────────────────────────────────────────────────────────────────
+# ── Vendor device format ────────────────────────────────────────────────────────────────
 
 class TestAvcxFormat:
     def test_iso_timestamp_prefix(self, tmp_path: Path) -> None: