chore: bump QPK artifact workflow pin

.github/workflows/drift-check.yml

@@ -94,7 +94,7 @@ jobs:
       contents: read
       issues: write
       id-token: write
-    uses: QuantStrategyLab/QuantPlatformKit/.github/workflows/reusable-drift-check.yml@bb91e4cad1a32d58dc0e4023f1cbe0c7ec150d81
+    uses: QuantStrategyLab/QuantPlatformKit/.github/workflows/reusable-drift-check.yml@6b887d9954eb656141597eac077ca22053a525ef
     with:
       strategy_domain: hk_equity
       caller_event_name: ${{ github.event_name }}
@@ -103,7 +103,7 @@ jobs:
       snapshot_checkout_path: external/HkEquitySnapshotPipelines
       snapshot_repository_ref: ${{ needs.preflight_backtests.outputs.snapshot_repository_ref }}
       ai_gateway_service_url: ${{ vars.AI_GATEWAY_SERVICE_URL }}
-      quant_platform_kit_ref: bb91e4cad1a32d58dc0e4023f1cbe0c7ec150d81
+      quant_platform_kit_ref: 6b887d9954eb656141597eac077ca22053a525ef
       lifecycle_preflight_artifact: lifecycle-preflight-${{ github.run_id }}-${{ github.run_attempt }}
     secrets:
       codex_audit_service_url: ${{ secrets.CODEX_AUDIT_SERVICE_URL }}

pyproject.toml

@@ -10,7 +10,7 @@ readme = "README.md"
 requires-python = ">=3.11"
 dependencies = [
   "pandas>=2.0",
-  "quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@bb91e4cad1a32d58dc0e4023f1cbe0c7ec150d81",
+  "quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@6b887d9954eb656141597eac077ca22053a525ef",
 ]
 
 [project.optional-dependencies]

qsl.toml

@@ -5,5 +5,5 @@ upgrade_ring = "ring_b"
 bundle = "2026.08.0"
 requires = [
   "pandas>=2.0",
-  "quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@bb91e4cad1a32d58dc0e4023f1cbe0c7ec150d81",
+  "quant-platform-kit @ git+https://github.com/QuantStrategyLab/QuantPlatformKit.git@6b887d9954eb656141597eac077ca22053a525ef",
 ]

tests/test_drift_workflow_config.py

@@ -1,7 +1,7 @@
 from pathlib import Path
 
 
-QPK_REF = "bb91e4cad1a32d58dc0e4023f1cbe0c7ec150d81"
+QPK_REF = "6b887d9954eb656141597eac077ca22053a525ef"
 
 
 def test_drift_workflow_builds_and_wires_lifecycle_preflight() -> None:

tests/test_qsl_compat_metadata.py

@@ -3,7 +3,7 @@
 
 
 ROOT = Path(__file__).resolve().parents[1]
-QPK_REVISION = "bb91e4cad1a32d58dc0e4023f1cbe0c7ec150d81"
+QPK_REVISION = "6b887d9954eb656141597eac077ca22053a525ef"
 QPK_URL = (
     "quant-platform-kit @ git+https://github.com/QuantStrategyLab/"
     f"QuantPlatformKit.git@{QPK_REVISION}"