Give spoken words a memory with an instant attached

An audio file used to produce no memory at all: _ingest_file returned an empty
batch for any suffix it did not know, with no log and no reason. It now raises
UnsupportedFile when you name the file and records a SkippedFile when it was a
directory walk, so a refusal is visible either way.

Speech is measured, not promised. Over 210.5 seconds of real Video-MME audio,
faster-whisper-tiny on CPU int8 transcribed at 51x realtime and reached word
error rate 0.242 against community subtitles nobody here wrote (a caption track
drops words a transcript keeps, so that is an upper bound). 66 speech atoms now
carry 550 word-level timestamps, 0 words out of order and 0 starting before
their own segment. The snapshot is 78.2 MB, under the 500 MB cap, and the report
is bench/reports/ASR.md.

Two library facts were measured rather than assumed. faster-whisper's own audio
loader is broken against PyAV 19 (av.open got an unexpected keyword
'metadata_errors') and it declares av with no version bound, so asr.decode_audio
decodes with PyAV directly and hands the model a float32 array instead of
pinning an old av with no cp314 wheel. And av.Error does not exist on PyAV 19 -
the real base is av.error.FFmpegError - so that is the only thing caught and my
own ValueErrors keep their messages.

Files over the 500-line rule were split rather than excused: ingestion.py (748)
into ingestion_common / ingestion_media / ingestion_repository / ingestion, and
cli.py (544) into cli_senses plus cli_common, following the cli_transactive
register pattern. MediaIngest declares _source_record abstract, so a half-wired
host fails at construction instead of returning None.

Verification: 207 tests pass; ruff clean on the 13 touched files; mypy clean on
them, and repo-wide mypy fell from 29 errors to 24 (5 fixed, none added);
pyright reports 0 errors on the touched files.

backend/tests/test_visual_tokens.py

@@ -13,7 +13,7 @@ from pathlib import Path
 import pytest
 from PIL import Image
 
-import ely_eye.ingestion as ingestion_module
+import ely_eye.ingestion_media as media_module
 from ely_eye.config import Settings
 from ely_eye.db import Database
 from ely_eye.ingestion import IngestionService
@@ -48,7 +48,7 @@ def test_a_region_without_a_size_is_refused_rather_than_guessed() -> None:
 
 def test_an_ingested_image_carries_its_text_and_its_patches(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
     settings = Settings(home=tmp_path)
-    monkeypatch.setattr(ingestion_module, "read_text_from_image", lambda path: OcrResult("购物车", 0.9, []))
+    monkeypatch.setattr(media_module, "read_text_from_image", lambda path: OcrResult("购物车", 0.9, []))
 
     database = _ingest(tmp_path, settings)
     atom = database.list_atoms()[0]
@@ -58,7 +58,7 @@ def test_an_ingested_image_carries_its_text_and_its_patches(tmp_path: Path, monk
 
 def test_an_existing_store_is_repriced_by_the_migration(tmp_path: Path, monkeypatch: pytest.MonkeyPatch) -> None:
     settings = Settings(home=tmp_path)
-    monkeypatch.setattr(ingestion_module, "read_text_from_image", lambda path: OcrResult("", 0.0, []))
+    monkeypatch.setattr(media_module, "read_text_from_image", lambda path: OcrResult("", 0.0, []))
     database = _ingest(tmp_path, settings)
     note = tmp_path / "notes.md"
     note.write_text("# 钥匙放在玄关抽屉里\n", encoding="utf-8")