Fix email-api Dockerfile: add missing shared-data COPY

email-data references shared-data but the email-api Dockerfile never
copied it into the build context, causing MSB9008 during Docker build.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Apis/email-api/Dockerfile

@@ -4,6 +4,7 @@ WORKDIR /src
 
 COPY Apis/email-api/email-api.csproj Apis/email-api/
 COPY Apis/email-data/email-data.csproj Apis/email-data/
+COPY Apis/shared-data/shared-data.csproj Apis/shared-data/
 COPY Apis/email-api-models/email-api-models.csproj Apis/email-api-models/
 COPY Apis/api-models/api-models.csproj Apis/api-models/
 COPY Apis/common/common.csproj Apis/common/
@@ -15,6 +16,7 @@ RUN dotnet restore Apis/email-api/email-api.csproj
 
 COPY Apis/email-api/ Apis/email-api/
 COPY Apis/email-data/ Apis/email-data/
+COPY Apis/shared-data/ Apis/shared-data/
 COPY Apis/email-api-models/ Apis/email-api-models/
 COPY Apis/api-models/ Apis/api-models/
 COPY Apis/common/ Apis/common/