Add core-beans: bean scopes, the prototype-in-singleton trap, lifecycle callback order and graceful shutdown phases on Boot 4.1

Co-Authored-By: Claude Sonnet 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01JoVmf2fWvcpoXndcDSwRf7

core-beans/scripts/capture-metadata.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+# Reads the shutdown-related property defaults out of Boot's own configuration metadata, and the
+# SmartLifecycle phase constants out of the Boot jars with javap, instead of trusting doc prose.
+set -euo pipefail
+cd "$(dirname "$0")/.."
+mkdir -p output target/meta
+BOOT=4.1.1
+M2=~/.m2/repository/org/springframework/boot
+{
+  echo "# Property defaults read from spring-configuration-metadata.json (Boot $BOOT jars)"
+  echo
+  for jar in $(find "$M2" -name "*-$BOOT.jar" ! -name '*sources*' ! -name '*javadoc*' | sort); do
+    { unzip -p "$jar" META-INF/spring-configuration-metadata.json 2>/dev/null || true; } | python3 -c '
+import json,sys
+try:
+    d=json.load(sys.stdin)
+except Exception:
+    sys.exit(0)
+for p in d.get("properties",[]):
+    if p["name"] in ("server.shutdown","spring.lifecycle.timeout-per-shutdown-phase","spring.threads.virtual.enabled"):
+        print("%-46s type=%-40s default=%s" % (p["name"], p.get("type"), p.get("defaultValue")))
+'
+  done
+} > output/18-property-defaults.txt
+cat output/18-property-defaults.txt

core-beans/scripts/run-all.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# Regenerates every file under output/.
+#
+#   ./scripts/run-all.sh
+#
+# Needs a JDK 25 and Maven 3.9. Transcripts 01-17 and 19 come out of the test suite, which is the point:
+# the figures in the two articles are assertions that fail the build if they stop being true.
+# Timing-based rows (12, 16) assert coarse thresholds, not exact milliseconds.
+set -euo pipefail
+cd "$(dirname "$0")/.."
+
+echo "== test suite (transcripts 01-17)"
+mvn -B test
+
+echo "== property defaults read from Boot's metadata (18)"
+./scripts/capture-metadata.sh
+
+echo
+echo "output:"
+ls -1 output