chore(deps): update python:3.14-slim docker digest to bc389f7

Dockerfile

@@ -1,5 +1,5 @@
 # Stage 1: Builder
-FROM python:3.14-slim@sha256:fb83750094b46fd6b8adaa80f66e2302ecbe45d513f6cece637a841e1025b4ca AS builder
+FROM python:3.14-slim@sha256:bc389f7dfcb21413e72a28f491985326994795e34d2b86c8ae2f417b4e7818aa AS builder
 
 # Install uv
 COPY --from=ghcr.io/astral-sh/uv:latest@sha256:c4f5de312ee66d46810635ffc5df34a1973ba753e7241ce3a08ef979ddd7bea5 /uv /usr/local/bin/uv
@@ -20,7 +20,7 @@ RUN uv sync --frozen --no-dev
 
 
 # Stage 2: Runtime
-FROM python:3.14-slim@sha256:fb83750094b46fd6b8adaa80f66e2302ecbe45d513f6cece637a841e1025b4ca
+FROM python:3.14-slim@sha256:bc389f7dfcb21413e72a28f491985326994795e34d2b86c8ae2f417b4e7818aa
 
 # Create non-root user
 RUN useradd --create-home --shell /bin/bash appuser

tests/integration/mock_grist/Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.14-slim@sha256:fb83750094b46fd6b8adaa80f66e2302ecbe45d513f6cece637a841e1025b4ca
+FROM python:3.14-slim@sha256:bc389f7dfcb21413e72a28f491985326994795e34d2b86c8ae2f417b4e7818aa
 
 WORKDIR /app