feat(03-06): add Databricks, Snowflake, Oracle GenAI, HPE GreenLake Tier 9 providers

- Databricks dapi-prefixed high-confidence regex pattern
- Snowflake/Oracle/HPE keyword-only detection
- Completes PROV-09 (8 Tier 9 enterprise providers)

providers/oracle-genai.yaml

@@ -0,0 +1,18 @@
+format_version: 1
+name: oracle-genai
+display_name: Oracle Cloud Generative AI Service
+tier: 9
+last_verified: "2026-04-05"
+keywords:
+  - "oci-generative-ai"
+  - "OCI_GENAI_COMPARTMENT"
+  - "oracle-cloud-genai"
+  - "inference.generativeai.us-chicago-1"
+  - "oci-cli"
+  - "OCI_CONFIG_FILE"
+verify:
+  method: GET
+  url: ""
+  headers: {}
+  valid_status: []
+  invalid_status: []