Add Prologue: Nim web framework (first Nim entry!)

frameworks/prologue/Dockerfile

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+FROM nimlang/nim:2.0.14-alpine AS build
+RUN apk add --no-cache sqlite-dev
+WORKDIR /app
+COPY src/ ./
+RUN nimble install -y prologue zippy db_connector
+RUN nim c -d:release -d:danger -d:usestd --opt:speed --threads:on --passL:-lsqlite3 -o:server server.nim
+
+FROM alpine:3.19
+RUN apk add --no-cache libgcc sqlite-libs
+COPY --from=build /app/server /server
+EXPOSE 8080
+CMD ["/server"]

frameworks/prologue/README.md

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+# Prologue (Nim)
+
+[Prologue](https://github.com/planety/prologue) is a powerful and flexible web framework written in Nim. Under the hood it uses [httpbeast](https://github.com/nicholasgasior/httpbeast) (via httpx) — a high-performance HTTP server that leverages epoll on Linux with multi-threaded request handling.
+
+## Why Prologue?
+
+- **Nim compiles to C** — native performance with a high-level, Python-like syntax
+- **httpbeast backend** — uses epoll and SO_REUSEPORT for multi-core scaling
+- **Zero-overhead routing** — trie-based router compiled at build time
+- **First Nim framework in HttpArena** — brings a new language to the benchmarks
+
+## Build
+
+```bash
+nim c -d:release -d:danger --opt:speed --threads:on -o:server server.nim
+```
+
+## Endpoints
+
+All standard HttpArena endpoints are implemented: `/pipeline`, `/baseline11`, `/baseline2`, `/json`, `/compression`, `/upload`, `/db`, `/static/{filename}`.

frameworks/prologue/build.sh

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+#!/bin/bash
+TAG="${1:-httparena-prologue}"
+docker build --network host -t "$TAG" -f "$(dirname "$0")/Dockerfile" "$(dirname "$0")"

frameworks/prologue/meta.json

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+{
+  "display_name": "prologue",
+  "language": "Nim",
+  "type": "framework",
+  "engine": "asynchttpserver",
+  "description": "Prologue web framework for Nim — compiles to native C with powerful routing and middleware support.",
+  "repo": "https://github.com/planety/prologue",
+  "enabled": true,
+  "tests": [
+    "baseline",
+    "pipelined",
+    "limited-conn",
+    "json",
+    "upload",
+    "compression",
+    "mixed",
+    "noisy"
+  ]
+}