feat(ontology): add core service catalog

services/ontology-core/docs/baseline/README.md

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+# Ontology Documents
+
+Primary documents:
+
+- `CANONICAL_ENTITY_CATALOG.md`
+- `RELATION_CATALOG.md`
+- `EVIDENCE_LEDGER.md`
+- `GUARDRAILS.md`
+- `TERMS_GLOSSARY.md`
+- `OPEN_QUESTIONS.md`
+- `IMPLEMENTATION_READINESS.md`
+
+Current accepted baseline:
+
+- Canonical Entity Catalog v0.4-pre is the active pre-release baseline.
+- HUB has an open contour and a managed client/company context.
+- `hub.public_pool_client` is a source-backed special Client used by the public pool context.
+- `hub.open_contour` must not be treated as an ordinary `hub.client_context`.
+- `ops.card` is the canonical OPS work object.
+- OPS Product, OPS Gateway, and ENGINE-side OpsLayer are different entities.
+- ENGINE L1/L2 workflow split is source-evidenced enough for first resolver implementation.
+- Engine-side OPS / Agent Monitor / tender-agent config is non-canonical tech debt.
+- Future Interface Layer is a planned separate layer/service, not more custom UI inside ENGINE core.
+
+Current working evidence artifacts:
+
+- `EVIDENCE_HARDENING_PLAN_V0_3_1.md`
+- `EVIDENCE_LEDGER_HUB_P0.md`
+- `EVIDENCE_LEDGER_OPS_P0.md`
+- `EVIDENCE_LEDGER_OPS_GATEWAY_P1.md`
+- `EVIDENCE_LEDGER_ENGINE_DIRTY_BOUNDARY_P1.md`
+- `EVIDENCE_LEDGER_ENGINE_WORKFLOW_P1.md`
+- `ONTOLOGY_SERVICE_PLACEMENT_AND_USE_CASES.md`