feat: add scopes array, optional_scopes, and scopes_join_strategy to declarative OAuth spec

Adds structured scopes support to oauth_connector_input_specification:
- scopes: array of strings, takes precedence over scope string
- optional_scopes: array of optional scopes
- scopes_join_strategy: enum (space/comma/plus), defaults to space per RFC 6749

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: aldogonzalez8

airbyte_cdk/sources/declarative/declarative_component_schema.yaml

@@ -3064,6 +3064,39 @@ definitions:
               The DeclarativeOAuth Specific string of the scopes needed to be grant for authenticated user.
             examples:
               - user:read user:read_orders workspaces:read
+          scopes:
+            title: Scopes
+            type: array
+            items:
+              type: string
+            description: |-
+              The DeclarativeOAuth Specific list of scopes needed to be granted for the authenticated user.
+              When present, takes precedence over the `scope` string property.
+              The scopes are joined using the `scopes_join_strategy` (default: space) before being
+              sent to the OAuth provider.
+            examples:
+              - ["user:read", "user:write"]
+          optional_scopes:
+            title: Optional Scopes
+            type: array
+            items:
+              type: string
+            description: |-
+              The DeclarativeOAuth Specific list of optional scopes to request from the OAuth provider.
+              These scopes may or may not be granted depending on the provider and user consent.
+            examples:
+              - ["admin:read"]
+          scopes_join_strategy:
+            title: Scopes Join Strategy
+            type: string
+            enum:
+              - space
+              - comma
+              - plus
+            default: space
+            description: |-
+              The strategy used to join the `scopes` array into a single string for the OAuth request.
+              Defaults to `space` per RFC 6749.
           access_token_url:
             title: Access Token URL
             type: string

airbyte_cdk/sources/declarative/models/declarative_component_schema.py

@@ -20,6 +20,12 @@ class AuthFlowType(Enum):
     oauth1_0 = "oauth1.0"
 
 
+class ScopesJoinStrategy(Enum):
+    space = "space"
+    comma = "comma"
+    plus = "plus"
+
+
 class BasicHttpAuthenticator(BaseModel):
     type: Literal["BasicHttpAuthenticator"]
     username: str = Field(
@@ -846,6 +852,23 @@ class Config:
         examples=["user:read user:read_orders workspaces:read"],
         title="Scopes",
     )
+    scopes: Optional[List[str]] = Field(
+        None,
+        description="The DeclarativeOAuth Specific list of scopes needed to be granted for the authenticated user.\nWhen present, takes precedence over the `scope` string property.\nThe scopes are joined using the `scopes_join_strategy` (default: space) before being\nsent to the OAuth provider.",
+        examples=[["user:read", "user:write"]],
+        title="Scopes",
+    )
+    optional_scopes: Optional[List[str]] = Field(
+        None,
+        description="The DeclarativeOAuth Specific list of optional scopes to request from the OAuth provider.\nThese scopes may or may not be granted depending on the provider and user consent.",
+        examples=[["admin:read"]],
+        title="Optional Scopes",
+    )
+    scopes_join_strategy: Optional[ScopesJoinStrategy] = Field(
+        ScopesJoinStrategy.space,
+        description="The strategy used to join the `scopes` array into a single string for the OAuth request.\nDefaults to `space` per RFC 6749.",
+        title="Scopes Join Strategy",
+    )
     access_token_url: str = Field(
         ...,
         description="The DeclarativeOAuth Specific URL templated string to obtain the `access_token`, `refresh_token` etc.\nThe placeholders are replaced during the processing to provide neccessary values.",