Finalize vault: fix Bases syntax, add Quartz fields, improve template

Changes from Codex review:
- Bases: rename .md -> .base, fix filter to file.name == 'index.md',
  fix formula to now() (not date(now)), add proper views section with
  table view and column order, add displayName for properties
- Frontmatter: add 'description' (SEO/link previews) and 'draft' (publishing
  control) fields for Quartz compatibility
- Template: add '## Scope' section, add '## Related Research' section for
  explicit wikilinks between topics, use path-qualified wikilinks in detail
  files section to avoid ambiguous basenames across topics
- README: fix cross-vault wikilink claim (separate vaults can't resolve
  cross-vault links; Quartz can't publish outside its content tree),
  document draft field, clarify that tags don't create graph edges

bases/research-base.base

@@ -0,0 +1,31 @@
+filters:
+  and:
+    - file.name == "index.md"
+formulas:
+  age_days: '((now() - file.ctime) / 86400000).floor()'
+properties:
+  title:
+    displayName: Title
+  status:
+    displayName: Status
+  category:
+    displayName: Category
+  tags:
+    displayName: Tags
+  created:
+    displayName: Created
+  updated:
+    displayName: Updated
+  formula.age_days:
+    displayName: Age
+views:
+  - type: table
+    name: Research
+    order:
+      - title
+      - status
+      - category
+      - tags
+      - created
+      - updated
+      - formula.age_days