Add serve mode, fix binary tags, document CLI tools, improve Docker

- Add 'serve' subcommand for ephemeral RAM-based relay at /dev/shm with
  open ACL mode for testing and benchmarking
- Fix e-tag and p-tag decoding to use ValueHex()/ValueBinary() methods
  instead of Value() which returns raw bytes for binary-optimized storage
- Document all command-line tools in readme.adoc (relay-tester, benchmark,
  stresstest, blossomtest, aggregator, convert, FIND, policytest, etc.)
- Switch Docker images from Alpine to Debian for proper libsecp256k1
  Schnorr signature and ECDH support required by Nostr
- Upgrade Docker Go version from 1.21 to 1.25
- Add ramdisk mode (--ramdisk) to benchmark script for eliminating disk
  I/O bottlenecks in performance measurements
- Add docker-compose.ramdisk.yml for tmpfs-based benchmark volumes
- Add test coverage for privileged policy with binary-encoded p-tags
- Fix blossom test to expect 200 OK for anonymous uploads when auth is
  not required (RequireAuth=false with ACL mode 'none')
- Update follows ACL to handle both binary and hex p-tag formats
- Grant owner access to all users in serve mode via None ACL
- Add benchmark reports from multi-relay comparison run
- Update CLAUDE.md with binary tag handling documentation
- Bump version to v0.30.2

cmd/benchmark/Dockerfile.benchmark

@@ -1,22 +1,11 @@
 # Dockerfile for benchmark runner
-FROM golang:1.25-alpine AS builder
+# Uses pure Go build with purego for dynamic libsecp256k1 loading
 
-# Install build dependencies including libsecp256k1 build requirements
-RUN apk add --no-cache git ca-certificates gcc musl-dev autoconf automake libtool make
+# Use Debian-based Go image to match runtime stage (avoids musl/glibc linker mismatch)
+FROM golang:1.25-bookworm AS builder
 
-# Build libsecp256k1 EARLY - this layer will be cached unless secp256k1 version changes
-# Using specific version tag and parallel builds for faster compilation
-RUN cd /tmp && \
-    git clone https://github.com/bitcoin-core/secp256k1.git && \
-    cd secp256k1 && \
-    git checkout v0.6.0 && \
-    git submodule init && \
-    git submodule update && \
-    ./autogen.sh && \
-    ./configure --enable-module-recovery --enable-module-ecdh --enable-module-schnorrsig --enable-module-extrakeys && \
-    make -j$(nproc) && \
-    make install && \
-    cd /tmp && rm -rf secp256k1
+# Install build dependencies (no secp256k1 build needed)
+RUN apt-get update && apt-get install -y --no-install-recommends git ca-certificates && rm -rf /var/lib/apt/lists/*
 
 # Set working directory
 WORKDIR /build
@@ -28,27 +17,25 @@ RUN go mod download
 # Copy source code
 COPY . .
 
-# Build the benchmark tool with CGO enabled
-RUN CGO_ENABLED=1 GOOS=linux go build -a -o benchmark ./cmd/benchmark
-
-# Copy libsecp256k1.so if available
-RUN if [ -f pkg/crypto/p8k/libsecp256k1.so ]; then \
-        cp pkg/crypto/p8k/libsecp256k1.so /build/; \
-    fi
+# Build the benchmark tool with CGO disabled (uses purego for crypto)
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o benchmark ./cmd/benchmark
 
 # Final stage
-FROM alpine:latest
+# Use Debian slim instead of Alpine because Debian's libsecp256k1 includes
+# Schnorr signatures (secp256k1_schnorrsig_*) and ECDH which Nostr requires.
+# Alpine's libsecp256k1 is built without these modules.
+FROM debian:bookworm-slim
 
-# Install runtime dependencies including libsecp256k1
-RUN apk --no-cache add ca-certificates curl wget libsecp256k1
+# Install runtime dependencies
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends ca-certificates curl libsecp256k1-1 && \
+    rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
 
-# Copy benchmark binary
+# Copy benchmark binary (libsecp256k1.so.1 is already installed via apt)
 COPY --from=builder /build/benchmark /app/benchmark
 
-# libsecp256k1 is already installed system-wide via apk
-
 # Copy benchmark runner script
 COPY cmd/benchmark/benchmark-runner.sh /app/benchmark-runner
 
@@ -56,13 +43,10 @@ COPY cmd/benchmark/benchmark-runner.sh /app/benchmark-runner
 RUN chmod +x /app/benchmark-runner
 
 # Create runtime user and reports directory owned by uid 1000
-RUN adduser -u 1000 -D appuser && \
+RUN useradd -m -u 1000 appuser && \
     mkdir -p /reports && \
     chown -R 1000:1000 /app /reports
 
-# Set library path
-ENV LD_LIBRARY_PATH=/app:/usr/local/lib:/usr/lib
-
 # Environment variables
 ENV BENCHMARK_EVENTS=50000
 ENV BENCHMARK_WORKERS=24
@@ -72,4 +56,4 @@ ENV BENCHMARK_DURATION=60s
 USER 1000:1000
 
 # Run the benchmark runner
-CMD ["/app/benchmark-runner"]
+CMD ["/app/benchmark-runner"]