feat(works): add eight Nietzsche works with aphorism numbering

[maehr]

Closes #36. Verified row from #25, part of #28.

Eight works, 2,737 references, no new citation system.

Work	Siglum	Aphorisms	Wikidata
Menschliches, Allzumenschliches	MA	638	Q1364539
Vermischte Meinungen und Sprüche	VM	408	— (see below)
Der Wanderer und sein Schatten	WS	350	Q3228311
Morgenröthe	M	575	Q1947770
Die fröhliche Wissenschaft	FW	383	Q1061693
Jenseits von Gut und Böse	JGB	296	Q579794
Der Antichrist	AC	62	Q538396
Die Geburt der Tragödie	GT	25	Q1053359

The reason this row was deferred no longer holds

#25 parked Nietzsche because the eKGWB URI was hash-based and "cannot be confirmed by fetch". The site now serves a real HTTPS path and validates the siglum server-side — FW-9999, XX-1 and FW-125x all return genuine 404s — so these resolvers are link-checkable like any other.

No new system

These reuse integer-section, whose own description invites it: "Generic integer section locators. Exact work-specific bounds are enforced by registered CanonicalReference records, not by this shape check." The siglum is a per-work constant in the resolver template, not a locator variable, so nothing new was needed.

How the extents were found

Binary search against the provider's own 404s — about ten requests per work instead of four hundred — with the boundary then checked explicitly in both directions. AC-62 resolves; AC-63 returns 404. Same for all eight.

The totals that came back are the counts these works are conventionally cited by, which is a useful independent check on the method.

Wikidata, and why keyword search was not enough

Searching by title was actively misleading. The top hit for Jenseits von Gut und Böse is a Bushido album; Morgenröthe and Der Antichrist did not surface at all under their English titles. Resolved instead with a single SPARQL query for every work whose author is Q9358, then each candidate confirmed to carry P50 = Q9358.

Vermischte Meinungen und Sprüche is registered without a Wikidata mapping. That query returns no separate item for it — Wikidata treats it only as part of Menschliches, Allzumenschliches II. Mapping it to the parent would assert something false, and AGENTS.md is explicit that the relation follows what the target actually is. It is cited on its own siglum and resolves on its own, so it is registered unmapped, with the reason in the file.

Two things worth a reviewer's eye

1. Key spelling. German umlauts are folded oe/ue/ae — nietzsche.morgenroete, nietzsche.froehliche-wissenschaft, nietzsche.jenseits-von-gut-und-boese, nietzsche.geburt-der-tragoedie. data: second-wave work candidates with established citation systems #25 sketched nietzsche.frohliche-wissenschaft instead. Renaming a key after publication is a tombstone event, so worth settling now.
2. Scope. Only works with plain integer aphorism numbering are here. GD, EH, GM and Za use compound sigla (GD-Sprueche-1) and a different locator shape; they need their own system and are not in this PR.

Checks

• npm run compile:data — 20 works, 10 systems, 70,696 references
• npm run validate:data — 70,757/70,757 records valid
• Boundary spot-checks confirmed absent from the dump: AC 63, GT 26, FW 384, M 576

[Copilot]

Pull request overview

Adds eight Friedrich Nietzsche works to the TextRefs registry as new works/*.yaml records, using the existing integer-section citation system with canonical aphorism/section extents and resolvers targeting Nietzsche Source (eKGWB). This expands the registry’s coverage of modern philosophy works without introducing a new citation-system shape.

Changes:

• Added 8 new work records under works/ with integer-section references and explicit references_range bounds (total 2,737 references).
• Added Nietzsche Source (eKGWB) resolvers for each work using server-validated path URLs (/eKGWB/{SIGLUM}-{section}) and recorded last_checked.
• Added Wikidata alternateOf mappings for 7 works and documented the intentional absence of a Wikidata mapping for Vermischte Meinungen und Sprüche.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
works/nietzsche.menschliches-allzumenschliches.yaml	New work record for Menschliches, Allzumenschliches with eKGWB resolver and integer-section extent (1–638).
works/nietzsche.vermischte-meinungen.yaml	New work record for Vermischte Meinungen und Sprüche with eKGWB resolver and extent (1–408), intentionally no Wikidata mapping.
works/nietzsche.wanderer-und-sein-schatten.yaml	New work record for Der Wanderer und sein Schatten with eKGWB resolver and extent (1–350).
works/nietzsche.morgenroete.yaml	New work record for Morgenröthe with eKGWB resolver and extent (1–575).
works/nietzsche.froehliche-wissenschaft.yaml	New work record for Die fröhliche Wissenschaft with eKGWB resolver and extent (1–383).
works/nietzsche.jenseits-von-gut-und-boese.yaml	New work record for Jenseits von Gut und Böse with eKGWB resolver and extent (1–296).
works/nietzsche.antichrist.yaml	New work record for Der Antichrist with eKGWB resolver and extent (1–62).
works/nietzsche.geburt-der-tragoedie.yaml	New work record for Die Geburt der Tragödie with eKGWB resolver and extent (1–25).

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