feat(pos-transactions): add payment edge flow

Why: baseline pending payment edge handlers and runtime assets before security wave.

What: add capture payment contracts/handlers, service adapter updates, and docs/docker assets.

Rule: keep technical intent and align repository workflow.

.dockerignore

@@ -0,0 +1,9 @@
+**/bin/
+**/obj/
+.vs/
+TestResults/
+.git/
+.repo-tasks/
+.repo-context/
+.tasks/
+.agile/

Dockerfile

@@ -0,0 +1,22 @@
+# syntax=docker/dockerfile:1.7
+ARG SDK_IMAGE=mcr.microsoft.com/dotnet/sdk:10.0
+ARG RUNTIME_IMAGE=mcr.microsoft.com/dotnet/aspnet:10.0
+
+FROM ${SDK_IMAGE} AS build
+ARG NUGET_FEED_URL=http://192.168.10.100:3000/api/packages/AgileWebs/nuget/index.json
+ARG NUGET_FEED_USERNAME=
+ARG NUGET_FEED_TOKEN=
+WORKDIR /src
+COPY . .
+
+RUN if [ -n "$NUGET_FEED_USERNAME" ] && [ -n "$NUGET_FEED_TOKEN" ]; then       dotnet nuget add source "$NUGET_FEED_URL"         --name gitea-org         --username "$NUGET_FEED_USERNAME"         --password "$NUGET_FEED_TOKEN"         --store-password-in-clear-text         --allow-insecure-connections         --configfile /root/.nuget/NuGet/NuGet.Config;     fi
+
+RUN dotnet restore "src/Pos.Transactions.Bff.Rest/Pos.Transactions.Bff.Rest.csproj" --configfile /root/.nuget/NuGet/NuGet.Config
+RUN dotnet publish "src/Pos.Transactions.Bff.Rest/Pos.Transactions.Bff.Rest.csproj" -c Release -o /app/publish /p:UseAppHost=false --no-restore
+
+FROM ${RUNTIME_IMAGE} AS runtime
+WORKDIR /app
+ENV ASPNETCORE_URLS=http://+:8080     ASPNETCORE_ENVIRONMENT=Production
+EXPOSE 8080
+COPY --from=build /app/publish .
+ENTRYPOINT ["dotnet", "Pos.Transactions.Bff.Rest.dll"]

docs/roadmap/feature-epics.md

@@ -0,0 +1,18 @@
+# Feature Epics
+
+## Repository
+pos-transactions-bff
+
+## Core Epics
+- Epic 1: Expand domain-aligned capabilities for restaurant operations.
+- Epic 2: Stabilize service contracts for containerized runtime integration.
+- Epic 3: Improve observability and operational readiness for demo compose environments.
+
+## Domain-Specific Candidate Features
+- Order lifecycle consistency and state transitions.
+- Kitchen queue and dispatch optimization hooks.
+- Operations control-plane policies (flags, service windows, overrides).
+- POS closeout and settlement summary alignment.
+
+## Documentation Contract
+Any code change in this repository must include docs updates in the same branch.

docs/runbooks/containerization.md

@@ -0,0 +1,40 @@
+# Containerization Runbook
+
+## Image Build
+
+If the repo consumes internal packages from Gitea, pass feed credentials as build args.
+
+```bash
+docker build   --build-arg NUGET_FEED_USERNAME=<gitea-login>   --build-arg NUGET_FEED_TOKEN=<gitea-token>   -t agilewebs/pos-transactions-bff:dev .
+```
+
+## Local Run
+
+```bash
+docker run --rm -p 8080:8080 --name pos-transactions-bff agilewebs/pos-transactions-bff:dev
+```
+
+## Health Probe
+
+- Path: `/health`
+- Fallback path: `/healthz`
+- Port: `8080`
+
+## Runtime Notes
+
+- Exposes REST edge endpoints for transaction summary and payment capture.
+
+## Health Endpoint Consistency
+
+- Canonical probe: `/health`
+- Compatibility probe: `/healthz`
+- Container port: `8080`
+
+## Demo Integration
+
+- Participates in: **restaurant** demo compose stack.
+- Integration artifact path: `greenfield/demo/restaurant/docker-compose.yml`
+## Known Limitations
+
+- Current runtime adapters are still predominantly in-memory for deterministic local/demo behavior.
+- Demo PostgreSQL seeds validate integration contracts and smoke determinism, but do not yet imply full persistence implementation parity.

src/Pos.Transactions.Bff.Application/Adapters/DefaultPosTransactionsServiceClient.cs

@@ -9,4 +9,9 @@ public sealed class DefaultPosTransactionsServiceClient : IPosTransactionsServic
     {
         return Task.FromResult(new GetPosTransactionSummaryResponse(request.ContextId, "Default service-backed response."));
     }
+
+    public Task<CapturePosPaymentResponse> CapturePaymentAsync(CapturePosPaymentRequest request, CancellationToken cancellationToken)
+    {
+        return Task.FromResult(new CapturePosPaymentResponse(request.ContextId, request.TransactionId, true, "Payment captured by default adapter."));
+    }
 }

src/Pos.Transactions.Bff.Application/Adapters/IPosTransactionsServiceClient.cs

@@ -6,4 +6,5 @@ namespace Pos.Transactions.Bff.Application.Adapters;
 public interface IPosTransactionsServiceClient
 {
     Task<GetPosTransactionSummaryResponse> FetchAsync(GetPosTransactionSummaryRequest request, CancellationToken cancellationToken);
+    Task<CapturePosPaymentResponse> CapturePaymentAsync(CapturePosPaymentRequest request, CancellationToken cancellationToken);
 }

src/Pos.Transactions.Bff.Application/Handlers/CapturePosPaymentHandler.cs

@@ -0,0 +1,13 @@
+using Pos.Transactions.Bff.Application.Adapters;
+using Pos.Transactions.Bff.Contracts.Requests;
+using Pos.Transactions.Bff.Contracts.Responses;
+
+namespace Pos.Transactions.Bff.Application.Handlers;
+
+public sealed class CapturePosPaymentHandler(IPosTransactionsServiceClient serviceClient) : ICapturePosPaymentHandler
+{
+    public Task<CapturePosPaymentResponse> HandleAsync(CapturePosPaymentRequest request, CancellationToken cancellationToken)
+    {
+        return serviceClient.CapturePaymentAsync(request, cancellationToken);
+    }
+}

src/Pos.Transactions.Bff.Application/Handlers/ICapturePosPaymentHandler.cs

@@ -0,0 +1,9 @@
+using Pos.Transactions.Bff.Contracts.Requests;
+using Pos.Transactions.Bff.Contracts.Responses;
+
+namespace Pos.Transactions.Bff.Application.Handlers;
+
+public interface ICapturePosPaymentHandler
+{
+    Task<CapturePosPaymentResponse> HandleAsync(CapturePosPaymentRequest request, CancellationToken cancellationToken);
+}

src/Pos.Transactions.Bff.Contracts/Requests/CapturePosPaymentRequest.cs

@@ -0,0 +1,8 @@
+namespace Pos.Transactions.Bff.Contracts.Requests;
+
+public sealed record CapturePosPaymentRequest(
+    string ContextId,
+    string TransactionId,
+    decimal Amount,
+    string Currency,
+    string PaymentMethod);

src/Pos.Transactions.Bff.Contracts/Responses/CapturePosPaymentResponse.cs

@@ -0,0 +1,7 @@
+namespace Pos.Transactions.Bff.Contracts.Responses;
+
+public sealed record CapturePosPaymentResponse(
+    string ContextId,
+    string TransactionId,
+    bool Succeeded,
+    string Summary);

src/Pos.Transactions.Bff.Rest/Program.cs

@@ -5,6 +5,7 @@ using Pos.Transactions.Bff.Contracts.Requests;
 var builder = WebApplication.CreateBuilder(args);
 builder.Services.AddSingleton<IPosTransactionsServiceClient, DefaultPosTransactionsServiceClient>();
 builder.Services.AddSingleton<IGetPosTransactionSummaryHandler, GetPosTransactionSummaryHandler>();
+builder.Services.AddSingleton<ICapturePosPaymentHandler, CapturePosPaymentHandler>();
 
 var app = builder.Build();
 
@@ -14,4 +15,12 @@ app.MapGet("/api/pos/transactions/summary", async (string contextId, IGetPosTran
     return Results.Ok(await handler.HandleAsync(request, ct));
 });
 
+app.MapPost("/api/pos/transactions/payments", async (CapturePosPaymentRequest request, ICapturePosPaymentHandler handler, CancellationToken ct) =>
+{
+    return Results.Ok(await handler.HandleAsync(request, ct));
+});
+
+app.MapGet("/health", () => Results.Ok(new { status = "ok", service = "pos-transactions-bff" }));
+app.MapGet("/healthz", () => Results.Ok(new { status = "ok", service = "pos-transactions-bff" }));
+
 app.Run();