fix: Enable incremental syncing for workflow_runs stream (#456)

## Problem

The `workflow_runs` stream currently fetches all historical workflow
runs instead of respecting the `start_date` configuration. This causes
significant performance issues for repositories with thousands of
workflow runs, as the tap processes all pages of historical data on
every run.

## Root Cause

The `WorkflowRunsStream` was configured with:
- `replication_key = None` (inheriting `updated_at` from parent
`RepositoryStream`)
- `ignore_parent_replication_key = False` 
- No custom URL parameter handling, it goes into 
**File: `tap_github/client.py`**
```python
class GitHubRestStream(RESTStream):
...
  if self.replication_key ==  "updated_at":
              params["sort"] = "updated"
              params["direction"] = "desc" if self.use_fake_since_parameter else  #"asc"
```
and tries to use the since logic.

However, the [GitHub Actions API
endpoint](https://docs.github.com/en/rest/actions/workflow-runs?apiVersion=2022-11-28#list-workflow-runs-for-a-repository)
(`/repos/{owner}/{repo}/actions/runs`) only supports:
- `created` parameter for date filtering (not `since`)

## Solution

This PR modifies the `WorkflowRunsStream` to:

1. **Set `replication_key = "created_at"`** - Use the field that GitHub
API supports
2. **Set `ignore_parent_replication_key = True`** - Use independent
replication logic
3. **Add custom `get_url_params` method** - Use `created` parameter
instead of `since`

## Changes Made

**File: `tap_github/repository_streams.py`**

```python
class WorkflowRunsStream(GitHubRestStream):
    replication_key = "created_at"  # Changed from None
    ignore_parent_replication_key = True  # Changed from False
    
    def get_url_params(self, context, next_page_token):
        params = super().get_url_params(context, next_page_token)
        
        # GitHub Actions API uses 'created' parameter instead of 'since'
        since = self.get_starting_timestamp(context)
        if self.replication_key and since:
            params["created"] = f"{since.isoformat(sep='T')}..*"
            
        return params
```

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: afkerhousse

tap_github/repository_streams.py

@@ -2961,9 +2961,9 @@ class WorkflowRunsStream(GitHubRestStream):
     name = "workflow_runs"
     path = "/repos/{org}/{repo}/actions/runs"
     primary_keys: ClassVar[list[str]] = ["id"]
-    replication_key = None
+    replication_key = "created_at"
     parent_stream_type = RepositoryStream
-    ignore_parent_replication_key = False
+    ignore_parent_replication_key = True
     state_partitioning_keys: ClassVar[list[str]] = ["repo", "org"]
     records_jsonpath = "$.workflow_runs[*]"
 
@@ -3006,6 +3006,21 @@ class WorkflowRunsStream(GitHubRestStream):
         th.Property("workflow_url", th.StringType),
     ).to_dict()
 
+    def get_url_params(
+        self,
+        context: Context | None,
+        next_page_token: Any | None,  # noqa: ANN401
+    ) -> dict[str, Any]:
+        """Return a dictionary of values to be used in URL parameterization."""
+        params = super().get_url_params(context, next_page_token)
+
+        # GitHub Actions API uses 'created' parameter instead of 'since'
+        since = self.get_starting_timestamp(context)
+        if self.replication_key and since:
+            params["created"] = f"{since.isoformat(sep='T')}..*"
+
+        return params
+
     def parse_response(self, response: requests.Response) -> Iterable[dict]:
         """Parse the response and return an iterator of result rows."""
         yield from extract_jsonpath(self.records_jsonpath, input=response.json())