wikidata_seed: drop deprecated-rank statements and unresolved bare QIDs

Removes 15,383 statements Wikidata itself marks as deprecated (P2241 'reason for deprecated rank'), which were being presented as facts - including a known-wrong death date for Christian Wilhelm Ahlwardt. Also drops entity-typed values that never resolved to a label and showed as bare QIDs.

Known remaining limitations (fixed in the forthcoming v2 store): no statement ranks, so competing values cannot be resolved (Belgium still carries 116 population statements); no references; English labels only.

wikidata_seed/wikidata_seed.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:a0147b9349631b736292dbbeecea71744bb6c0aef5a9e2c2e354c2863a9f17dd
-size 57860701
+oid sha256:83c03da3fbf3944398b8f49c1639ac7e6eaf2906a30a3b7bf9181c3040e41cfc
+size 57202797