Harden Oghma retrieval and knowledge classes

[RANGROO]

Summary

• add native Oghma parity runtime, catalog lifecycle, status vocabulary, and parity evidence
• ship the curated Skyrim catalog with grounded retrieval, aliases, rich relational tags, and protected custom rows
• add a checked-in CHIM knowledge-class ontology and immutable catalog v1.3
• fix all 45 malformed rift reach basic-class assignments to distinct rift and reach classes
• keep 1,509 ordinary basic articles on common and move 53 reviewed deep-lore subjects to esoteric
• add retrieval_phrases as the only non-topic/alias metadata allowed to identify an article by itself
• make ordinary tags corroborate/rank an existing topic match without creating a topic
• canonicalize only 15 reviewed singular/plural phrase pairs before owner counts; no general stemming
• retain backward-compatible import and rollback for format-v1 catalog packages
• preserve unrestricted access for legacy/custom rows with an empty class and knowall as an explicit advanced override

This consolidates the Oghma work currently split across drafts #693, #695, and #697; those PRs remain open for manual review.

Validation

• php unittests/oghma_parity_harness.php --iterations=500: 63 contract cases, 0 failures; p50 0.511 ms, p95 1.215 ms, p99 1.332 ms (25 ms p95 budget)
• WSL focused PHPUnit: 19 tests, 5,251 assertions across parity, catalog lifecycle, and migration runner
• catalog audit: 1,562 rows; 1,509 common basic; 53 esoteric basic; 0 malformed rift reach; 45 corrected rift + reach; 3 safe retrieval phrases
• production-catalog probes resolve Night Mother -> dark_brotherhood, Cloud District -> dragonsreach, and Colored Rooms -> meridia
• confirmed false-pull probes now abstain for It is hostile when provoked., This is a hidden location., and Tell me about the adjacent place.
• PHP lint, JSON parsing, catalog checksum verification, schema-contract verification, and git diff --check passed

Limits

• not deployed locally in this update
• not verified in a live Skyrim conversation
• Windows database-backed PHPUnit launcher cannot express its Unix-style PGPASSWORD=... command; the database suites were run successfully inside the configured WSL environment

[RANGROO]

Superseded by consolidated draft #701, which contains this work plus the completed Oghma catalog, retrieval, knowledge-class, biography, parity, and UI changes. Please review the combined draft there.