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)

pkg/providers/definitions/databricks.yaml

@@ -0,0 +1,23 @@
+format_version: 1
+name: databricks
+display_name: Databricks (DBRX / Mosaic)
+tier: 9
+last_verified: "2026-04-05"
+keywords:
+  - "databricks"
+  - "DATABRICKS_TOKEN"
+  - "DATABRICKS_HOST"
+  - "dbrx"
+  - "mosaicml"
+  - "dapi"
+  - ".cloud.databricks.com"
+patterns:
+  - regex: 'dapi[a-f0-9]{32}(-[0-9]{1,2})?'
+    entropy_min: 3.5
+    confidence: high
+verify:
+  method: GET
+  url: ""
+  headers: {}
+  valid_status: []
+  invalid_status: []

pkg/providers/definitions/hpe-greenlake.yaml

@@ -0,0 +1,18 @@
+format_version: 1
+name: hpe-greenlake
+display_name: HPE GreenLake for LLMs
+tier: 9
+last_verified: "2026-04-05"
+keywords:
+  - "hpe-greenlake"
+  - "greenlake"
+  - "HPE_CLIENT_ID"
+  - "HPE_CLIENT_SECRET"
+  - "common.cloud.hpe.com"
+  - "hpe-ai"
+verify:
+  method: GET
+  url: ""
+  headers: {}
+  valid_status: []
+  invalid_status: []

pkg/providers/definitions/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: []

pkg/providers/definitions/snowflake.yaml

@@ -0,0 +1,19 @@
+format_version: 1
+name: snowflake
+display_name: Snowflake Cortex
+tier: 9
+last_verified: "2026-04-05"
+keywords:
+  - "snowflake"
+  - "SNOWFLAKE_ACCOUNT"
+  - "SNOWFLAKE_USER"
+  - "SNOWFLAKE_PASSWORD"
+  - "SNOWFLAKE_PRIVATE_KEY"
+  - "snowflakecomputing.com"
+  - "cortex"
+verify:
+  method: GET
+  url: ""
+  headers: {}
+  valid_status: []
+  invalid_status: []