chore(scripts): add scripts index and archive one-shot scripts (#4822)

chore(scripts): index scripts/ and archive 29 one-shot scripts

backlog#1153 infra-13. scripts/ had 80+ unlabelled top-level entries
mixing CI gates with finished one-shot issue-validation scripts.

- scripts/README.md — one index row per entry with status
  (ci-gate / dev-tool / archived), purpose, and wiring; subdirectories
  get one row each. run_scanner_benchmarks.sh is annotated
  "disposition owned by backlog perf-10" and deliberately untouched.
- git mv 29 confirmed-stale one-shot entries to scripts/archive/:
  11 issue-scoped validation/perf-capture scripts, the 5-script
  backlog#706 large-PUT breakdown family, the 4-file GET-optimization
  stress suite, 2 gt1g one-shots, and 7 other orphaned one-shots.
  Evidence: a whole-tree boundary-aware reference census showed zero
  references from CI/Makefiles/docs/code for every moved entry (or
  references only from other scripts inside the same archived set);
  re-run after the move shows zero dangling references.
- docs/testing/README.md links the index.

Moves only — no script content changed.

scripts/archive/setup-test-binaries.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+# Setup test binaries for Docker build testing
+# This script creates temporary binary files for testing Docker build process
+
+set -e
+
+echo "Setting up test binaries for Docker build..."
+
+# Create temporary rustfs binary
+./build-rustfs.sh -p x86_64-unknown-linux-gnu
+
+# Create test directory structure
+mkdir -p test-releases/server/rustfs/release/linux-amd64/archive
+mkdir -p test-releases/server/rustfs/release/linux-arm64/archive
+
+# Get version
+VERSION=$(git describe --abbrev=0 --tags 2>/dev/null || git rev-parse --short HEAD)
+
+# Copy binaries
+cp target/x86_64-unknown-linux-gnu/release/rustfs test-releases/server/rustfs/release/linux-amd64/archive/rustfs.${VERSION}
+cp target/x86_64-unknown-linux-gnu/release/rustfs.sha256sum test-releases/server/rustfs/release/linux-amd64/archive/rustfs.${VERSION}.sha256sum
+
+# Create dummy signatures
+echo "dummy signature" > test-releases/server/rustfs/release/linux-amd64/archive/rustfs.${VERSION}.minisig
+echo "dummy signature" > test-releases/server/rustfs/release/linux-arm64/archive/rustfs.${VERSION}.minisig
+
+# Also copy for arm64 (using same binary for testing)
+cp target/aarch64-unknown-linux-gnu/release/rustfs test-releases/server/rustfs/release/linux-arm64/archive/rustfs.${VERSION}
+cp target/aarch64-unknown-linux-gnu/release/rustfs.sha256sum test-releases/server/rustfs/release/linux-arm64/archive/rustfs.${VERSION}.sha256sum
+
+echo "Test binaries created for version: ${VERSION}"
+echo "You can now test Docker builds with these local binaries"
+echo ""
+echo "To start a local HTTP server for testing:"
+echo "  cd test-releases && python3 -m http.server 8000"
+echo ""
+echo "Then modify Dockerfile to use http://host.docker.internal:8000 instead of https://dl.rustfs.com/artifacts/rustfs"