feat(source-notion): add oauth_connector_input_specification for declarative OAuth (#75577)

Author: lazebnyi

airbyte-integrations/connectors/source-notion/manifest.yaml

@@ -336,6 +336,18 @@ spec:
       - auth_type
     predicate_value: OAuth2.0
     oauth_config_specification:
+      oauth_connector_input_specification:
+        consent_url: "https://api.notion.com/v1/oauth/authorize?{{client_id_param}}&{{redirect_uri_param}}&response_type=code&{{state_param}}"
+        access_token_url: "https://api.notion.com/v1/oauth/token"
+        access_token_headers:
+          Authorization: "Basic {{ (client_id_value ~ ':' ~ client_secret_value) | b64encode }}"
+          Content-Type: "application/x-www-form-urlencoded"
+        access_token_params:
+          grant_type: "authorization_code"
+          code: "{{ auth_code_value }}"
+          redirect_uri: "{{ redirect_uri_value }}"
+        extract_output:
+          - access_token
       complete_oauth_output_specification:
         type: object
         properties:

airbyte-integrations/connectors/source-notion/metadata.yaml

@@ -10,7 +10,7 @@ data:
   connectorSubtype: api
   connectorType: source
   definitionId: 6e00b415-b02e-4160-bf02-58176a0ae687
-  dockerImageTag: 4.0.4
+  dockerImageTag: 4.0.5
   dockerRepository: airbyte/source-notion
   documentationUrl: https://docs.airbyte.com/integrations/sources/notion
   externalDocumentationUrls:

docs/integrations/sources/notion.md

@@ -122,6 +122,7 @@ The Blocks stream recursively fetches child blocks up to 30 levels deep. Pages w
 
 | Version     | Date       | Pull Request                                             | Subject                                                                                                                                                                |
 |:------------|:-----------|:---------------------------------------------------------|:-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| 4.0.5 | 2026-04-01 | [75577](https://github.com/airbytehq/airbyte/pull/75577) | Add `oauth_connector_input_specification` for declarative OAuth |
 | 4.0.4 | 2026-03-31 | [75747](https://github.com/airbytehq/airbyte/pull/75747) | Update dependencies |
 | 4.0.3 | 2026-03-30 | [75603](https://github.com/airbytehq/airbyte/pull/75603) | Fix 429 status code mapping from RETRY to RATE_LIMITED for improved rate limit handling and observability |
 | 4.0.2 | 2026-03-23 | [75290](https://github.com/airbytehq/airbyte/pull/75290) | Update v4.0.0 upgrade deadline to 2026-04-10 |