chore: classify the hall as a publication

Implements CUST-WP-0070-T03; clears C-24 and C-35. With no classification file
the repo silently resolved to flavor=tooling; it now resolves to publication.

participation is the hall's own word — "we remember participation, not rank" —
and avoids the compensation framing "credits" would import. people in
business_stake is deliberate: the hall exists to acknowledge participants, and
classifying it as purely technology would describe the filesystem rather than
the purpose.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SQ6oF1DtVDKcD1FCpvRVLx

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 272883@bnt-lap001
Assistant-Session: f40c8f53-fb65-4980-9d29-bcdb3dd946f7

.repo-classification.yaml

@@ -0,0 +1,20 @@
+repo_classification:
+  standard: Repo Classification Standard
+  version: '1.1'
+  classified_at: '2026-09-05'
+  classified_by: agent
+  category: publication
+  domain: infotech
+  secondary_domains:
+  - agents
+  capability_tags:
+  - knowledge
+  - documentation
+  - history
+  - participation
+  business_stake:
+  - technology
+  - people
+  business_mechanics:
+  - coordination
+  - intention