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

scripts/runtests.sh

@@ -3,9 +3,8 @@
 # libsecp256k1 is loaded dynamically at runtime if available
 export CGO_ENABLED=0
 
-# Download libsecp256k1.so from nostr repository if not present
-if [ ! -f "libsecp256k1.so" ]; then
-    wget -q https://git.mleku.dev/mleku/nostr/raw/branch/main/crypto/p8k/libsecp256k1.so -O libsecp256k1.so 2>/dev/null || true
+# Verify libsecp256k1.so exists in repo (should be at repo root)
+if [ -f "libsecp256k1.so" ]; then
     chmod +x libsecp256k1.so 2>/dev/null || true
 fi