fix: pass stream_slicer when creating retriever in DynamicSchemaLoader

[devin-ai-integration]

Summary

create_dynamic_schema_loader in ModelToComponentFactory failed with TypeError: missing 1 required keyword-only argument: 'stream_slicer' when the retriever was an AsyncRetriever. This is because AsyncRetriever requires stream_slicer as a keyword-only argument, but only partition_router was being passed.

The fix passes both stream_slicer and partition_router when creating the retriever, mirroring the existing pattern in create_default_stream (line ~2086).

Resolves https://github.com/airbytehq/oncall/issues/11848:

• https://github.com/airbytehq/oncall/issues/11848

Resolves #766:

• AsyncRetriever cannot be used in DynamicSchemaLoader - parameter name mismatch #766

Review & Testing Checklist for Human

• Verify the stream_slicer=partition_router pattern in create_dynamic_schema_loader matches the established pattern in create_default_stream — both should pass stream_slicer and partition_router with the same value
• Confirm the regression test actually fails without the fix (revert the production code change and run pytest unit_tests/sources/declarative/parsers/test_model_to_component_factory.py::test_dynamic_schema_loader_with_async_retriever)
• Validate that the blocked community PR (airbyte#66221 — source-blackbaud-sky-nxt) would be unblocked by this CDK fix

Notes

• The test covers component creation/instantiation only, not runtime schema fetching behavior. This is sufficient to catch the specific TypeError but does not exercise the full DynamicSchemaLoader + AsyncRetriever data path.
• Other callers were checked: create_http_components_resolver already correctly passes stream_slicer.
• This is a non-breaking PATCH-level bug fix — no version bump or metadata changes needed (CDK fix, not connector).

Link to Devin session: https://app.devin.ai/sessions/1035eef80d1f48f6ab01e96589caedb1

[devin-ai-integration]

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[github-actions]

PyTest Results (Fast)

3 976 tests  +1   3 965 ✅ +1   7m 33s ⏱️ -1s
    1 suites ±0      11 💤 ±0 
    1 files   ±0       0 ❌ ±0 

Results for commit 3c50ce4. ± Comparison against base commit 69cd63d.

[github-actions]

PyTest Results (Full)

3 979 tests  +1   3 967 ✅ +1   10m 49s ⏱️ -31s
    1 suites ±0      12 💤 ±0 
    1 files   ±0       0 ❌ ±0 

Results for commit 3c50ce4. ± Comparison against base commit 69cd63d.