feat(domain): naming template engine (Jinja safe subset, MP variables, path layout)

- naming/engine: lexer/parser/AST/render for {{ }} / if-elif-else / whitelisted filters
  (default pad pad2 upper lower trim replace truncate date join); rejects for/set/attribute/
  subscript/call/~/% with line:col errors and 'did you mean' hints
- naming/variables: variable table aligned with MoviePilot names plus ours (cut, airDate,
  issue, slotName, libraryRoot ...); buildNamingVars from parsed release + entity + units
- naming/layout: split by literal '/', segment roles (category/root/season/sub/file),
  value escaping, reserved names, 255-byte segments, validateNamingTemplate
- naming/defaults: MP default movie/tv + our variety template, v1 syntax upgrade,
  entity > root > global override resolution, builtin preview samples
- path/binding: resolveTargetDirectory keeps bound dirs, only unbound segments render;
  renderMediaFileName = last segment of the full template; DEFAULT_TEMPLATES = MP v2
- differential: 34 cases vs MP (21 identical, 13 documented deviations)

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/server/test/e2e/e7-tv-series.test.ts

@@ -206,8 +206,8 @@ describe.skipIf(!hasPg)("E7 常规剧集纵切", () => {
       expect(existsSync(join(e.lib.root, f.target_path!))).toBe(true);
     }
     expect(files.map((f) => f.target_path!)).toEqual([
-      expect.stringMatching(/S01E01\.mkv$/),
-      expect.stringMatching(/S01E02\.mkv$/),
+      expect.stringMatching(/S01E01 - 第 1 集\.mkv$/),
+      expect.stringMatching(/S01E02 - 第 2 集\.mkv$/),
     ]);
     // 路径绑定固定:没有因为第二集新建任何绑定
     const bindings1 = await e.db