feat: mark more fields linkable (#664)

This PR marks more fields in the declarative component schema with `linkable: true`, which allows those fields to be "linked" together in the Builder UI, which means changing that field in one stream will also change it in any other streams that have enabled linking for that field.

<img width="600" height="682" alt="Screenshot 2025-07-18 at 10 34 34 AM" src="https://github.com/user-attachments/assets/9ab46c87-6e37-45de-a963-4ce817a7b63a" />


<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit

* **New Features**
  * Introduced a new property marking several components as linkable within the declarative source manifest, enhancing schema metadata without affecting functionality or validation.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: lmossman

airbyte_cdk/sources/declarative/declarative_component_schema.yaml

@@ -1511,6 +1511,7 @@ definitions:
       incremental_sync:
         title: Incremental Sync
         description: Component used to fetch data incrementally based on a time field in the data.
+        linkable: true
         anyOf:
           - "$ref": "#/definitions/DatetimeBasedCursor"
           - "$ref": "#/definitions/IncrementingCountCursor"
@@ -1543,6 +1544,7 @@ definitions:
       transformations:
         title: Transformations
         description: A list of transformations to be applied to each output record.
+        linkable: true
         type: array
         items:
           anyOf:
@@ -1566,6 +1568,7 @@ definitions:
       file_uploader:
         title: File Uploader
         description: (experimental) Describes how to fetch a file
+        linkable: true
         type: object
         required:
           - type
@@ -2128,6 +2131,7 @@ definitions:
       request_parameters:
         title: Query Parameters
         description: Specifies the query parameters that should be set on an outgoing HTTP request given the inputs.
+        linkable: true
         anyOf:
           - type: object
             title: Key/Value Pairs
@@ -2150,6 +2154,7 @@ definitions:
       request_headers:
         title: Request Headers
         description: Return any non-auth headers. Authentication headers will overwrite any overlapping headers returned from this method.
+        linkable: true
         anyOf:
           - type: object
             title: Key/Value Pairs
@@ -2209,6 +2214,7 @@ definitions:
       request_body:
         title: Request Body
         description: Specifies how to populate the body of the request with a payload. Can contain nested objects.
+        linkable: true
         anyOf:
           - "$ref": "#/definitions/RequestBodyPlainText"
           - "$ref": "#/definitions/RequestBodyUrlEncodedForm"
@@ -2222,6 +2228,7 @@ definitions:
       error_handler:
         title: Error Handler
         description: Error handler component that defines how to handle errors.
+        linkable: true
         anyOf:
           - "$ref": "#/definitions/DefaultErrorHandler"
           - "$ref": "#/definitions/CompositeErrorHandler"
@@ -3664,6 +3671,7 @@ definitions:
         "$ref": "#/definitions/RecordSelector"
       paginator:
         description: Paginator component that describes how to navigate through the API's pages.
+        linkable: true
         anyOf:
           - "$ref": "#/definitions/DefaultPaginator"
           - "$ref": "#/definitions/NoPagination"
@@ -3674,6 +3682,7 @@ definitions:
       partition_router:
         title: Partition Router
         description: Used to iteratively execute requests over a set of values, such as a parent stream's records or a list of constant values.
+        linkable: true
         anyOf:
           - "$ref": "#/definitions/SubstreamPartitionRouter"
           - "$ref": "#/definitions/ListPartitionRouter"