refactor(release): rename ParsePath enum to TokenizationRoute

ParsePath collided with pathlib.Path in mental models, and was one
letter from the parse_path attribute that stores its value — confusion
on confusion. Road (EASY/SHITTY/PATH_OF_PAIN) is the parser-confidence
axis; TokenizationRoute (DIRECT/SANITIZED/AI) is the tokenization-method
axis. They're orthogonal and the new name makes that obvious.

Field name parse_path stays — it's the right name for the attribute
that *holds* the route. String values ("direct", "sanitized", "ai")
stay too, so YAML fixtures and the analyze_release tool spec are
unchanged. Only the type symbol changes:

- value_objects.py: class rename + docstring spelling out orthogonality
  with Road.
- services.py: 3 call sites.
- scoring.py: docstring cross-reference updated.
- tests/domain/release/test_parser_v2_scoring.py: import + 3 call sites.

CHANGELOG.md

@@ -57,6 +57,17 @@ callers).
 
 ### Changed
 
+- **`ParsePath` enum renamed to `TokenizationRoute`.** The old name
+  collided with `pathlib.Path` in code-reading mental models, and was
+  one letter from `parse_path` (the field that holds the value) — making
+  it harder than it needed to be to spot the type vs the attribute.
+  ``TokenizationRoute`` says what it actually captures (DIRECT /
+  SANITIZED / AI = how the name reached the tokenizer), and the class
+  docstring now spells out the orthogonality with ``Road`` (EASY /
+  SHITTY / PATH_OF_PAIN, which captures parser confidence on
+  ``ParseReport``). The ``parse_path`` field name stays unchanged —
+  string values too — so YAML fixtures, the ``analyze_release`` tool
+  spec, and any external consumer are untouched.
 - **`enrich_from_probe` codec mappings moved to YAML.** The three
   hard-coded module dicts (`_VIDEO_CODEC_MAP`, `_AUDIO_CODEC_MAP`,
   `_CHANNEL_MAP`) translating ffprobe output to scene tokens