Wiki hygiene: archive: provenance field, alias retirement, link/bib cleanup (#34)

- 59 pages: off-repo .pdf entries move from frontmatter sources: into a new
  archive: list — read-only provenance from the 2026-05 import, defined in
  wiki/CLAUDE.md (human-decided KEEP; the no-PDF-paths rule stays for
  everything else).
- The never-used alias subsystem is retired (human-decided):
  bibkey_aliases.yaml deleted; alias legs stripped from
  validate_literature_citations.py, its tests, and bibliography/README.md.
- 27 path-shaped [[../...]] wikilinks normalized to slugs per the slug-only
  rule; the smbh CLAUDE.md cross-wiki example rewritten to match.
- 33 uncited junk-keyed bib entries deleted (SN-designation 2001eq..2001fa,
  ADS-bibcode, colon-key classes; verified uncited before and after —
  1,099 -> 1,066 entries, citation metadata valid).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: 2 people

bibliography/README.md

@@ -22,18 +22,13 @@ personal library in 2026-07 — the merge audit is in git history.)
 Never record a local PDF path or infer claims from a filename. If metadata or support is
 uncertain, add a TODO rather than guessing.
 
-## Aliases and downstream projects
-
-`bibkey_aliases.yaml` is a flat YAML mapping from a known alternate key to its canonical key:
-
-```yaml
-Suyu16H0: Suyu2016Holicow
-```
+## Downstream projects
 
 Before patching another project's LaTeX, inspect that project's `.bib`. Match papers by DOI,
 then arXiv ID, then title/authors, and use the project's existing key when present. Do not
-assume a PyAutoMemory canonical key exists downstream. Add an alias only for an alternate key
-that is actually in use.
+assume a PyAutoMemory canonical key exists downstream. (A key-alias subsystem existed but was
+never used and was retired in #34; renaming a canonical key is a sed across the wiki, which
+validation guards.)
 
 ## Validation
 
@@ -42,6 +37,6 @@ make validate-literature-citations
 # or: python scripts/validate_literature_citations.py
 ```
 
-Duplicate canonical keys, missing source keys, new claim entries without canonical keys, and
-aliases with missing targets fail validation. Canonical entries not yet referenced by a wiki
-source entry are reported but do not fail; use `--show-all` for the complete list.
+Duplicate canonical keys, missing source keys, and new claim entries without canonical keys
+fail validation. Canonical entries not yet referenced by a wiki source entry are reported but
+do not fail; use `--show-all` for the complete list.