Port ancestry/trees to N1QL + soft-delete finders + pagination order

- Ancestry now runs on the materialized path (path_ids), no map/reduce: children
  = path_ids[len-2] = $id, subtree = $id IN path_ids, roots = ARRAY_LENGTH = 1.
  ancestry_spec: 31/31.
- Soft-delete-aware find_by/find_all_by: composite [key, deleted_at] keys compare
  element-wise so a nil component matches MISSING/NULL (non-deleted docs).
- Deterministic ordering: secondary sort by created_at; timestamps now microsecond
  precision so same-second creations paginate in creation order.
- by_property (namespaced) trees span all partitions when no value is given.
- Tagged the remaining CouchDB-mechanic specs :couchdb_only (view generation,
  design-doc maintenance, raw JS views, documented not-supported habtm cases).

Result: 403/403 applicable examples green on a clean run (one namespaced-ancestry
reparent edge is intermittently flaky). Up from 378/432.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.memsearch/memory/2026-06-20.md

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+
+## Session 14:03
+
+### 14:03
+<!-- session:9e383fdc-7871-41ba-aa1c-7e9f48e9969b turn: transcript:/Users/greg/.claude/projects/-Users-greg-Documents-Projects/9e383fdc-7871-41ba-aa1c-7e9f48e9969b.jsonl -->
+- User confirmed publishing preferences: private repo under gbentz2, stop at 88% test pass rate (shipping 378/432 tests green).
+- Claude Code created private GitHub repo `gbentz2/simply_based`, pushed commit `86299b8` with `SimplyBased::Model` (Couchbase-native ORM), and scrubbed GitHub token from environment.
+- Claude Code stopped the local Couchbase Docker container (`docker stop sc-cb`).
+- Claude Code updated memory file `project_simply_couch_adapter_work.md` to log completion status and defer remaining 54 test failures (ancestry/tree, embedded reverse-lookup, pagination edges) to future work.
+- Delivered three artifacts: PR #10 (adapter refactor), `simply_couch-couchbase` gem, and `simply_based` ORM with CRUD/finders/associations/validations verified green, Redis replacement (Counter/Cache/Lock) at 5/5 green, and deferred tree/embedded work flagged.
+