Add 1:N entity views (ldh:inverseView) + LinkedDataHub-Apps-style make install

[namedgraph]

Summary

• app/ns.ttl — new LDH namespace ontology (served at {base}ns, northwind-traders pattern) defining five ldh:inverseView 1:N views, each a ldh:View + spin:query → sp:Select with $about:

  View	Property	Appears on
  Sudedamieji vienetai	dct:isPartOf	every admin unit (county→municipalities→elderships→settlements→streets)
  Dabartiniai nariai / Buvę nariai	org:organization	committees, commissions, factions, parliamentary groups, the Seimas
  Padaliniai	org:unitOf	the Seimas
  Iškelti Seimo nariai	ltlod:nominatedBy	parties

• Discriminating types — LDH matches views by exact rdf:type against the property's declared rdfs:range, so parties gain schema:PoliticalParty and the Seimas cv:PublicOrganisation (EU CPOV) in the seimas mappings; seimas datasets regenerated (prod base, type triples are the only semantic diff). Legal-entity pages match no views — no empty blocks.

• app/import-ns.sh + app/patch-ontology.ru — reset + POST the ontology into the admin ontologies/namespace/ document (with @base <{base}ns>) and evict the server-side ontology cache; chained into app/install.sh, idempotent.

• Interactive make install — LinkedDataHub-Apps-style prompts (Base URL / cert / password / proxy) with defaults from the local stack; Enter×4 = local install, another Base URL installs the app onto any LDH instance.

• Public dataspace on install — app/install.sh starts with the LDH CLI make-public.sh (northwind position), granting the same class-based read access as make public but through LDH's HTTP API, so it also works against remote instances; both remain idempotent.

Test plan

• riot --validate on ns.ttl (with install-time @base), qparse on all five embedded queries
• make -C etl/seimas BASE=https://linkeddata.lt/ — SHACL conforms, graph counts unchanged (148 persons / 137 org units / 11 parties)
• make install against the local stack: all documents PUT, /ns serves exactly 5 views; re-run confirms idempotence
• Simulated LDH's view-discovery query per type set: each view fires only on intended pages (nothing on legal entities/streets)
• All five view SELECTs against local SPARQL: 60 municipalities/10 counties, committee 8 = 13 current + 16 former members, Seimas = 136 units + 140 current MPs, party nominees LSDP 54 / TS-LKD 30

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