Record v0.3.0 benchmark baseline and update memo

Author: chaploud

.dev/memo.md

@@ -59,22 +59,18 @@ Java interop policy: Library-driven. Test real libraries as-is (no forking/embed
 
 ## Current Task
 
-Phase 88: v0.3.0 Release (v0.2.0 was premature, 143 commits since)
-88.2: Release notes
-- Write proper release notes for GitHub release
+Phase 88: v0.3.0 Release
+88.5: Push commits, create v0.3.0 tag, trigger CI release workflow
 
 ## Previous Task
 
-88.1: Version bump to v0.3.0 + CHANGELOG created.
+88.1-88.4: Version bump, CHANGELOG, benchmarks, binary audit.
 
 ## Task Queue
 
 ```
-88.2: Release notes
-88.3: Benchmark record (full history entry)
-88.4: Binary audit (no debug symbols, no embedded secrets)
-88.5: GitHub Release with pre-built binaries (macOS ARM64 + Linux x86_64)
-88.6: Cross-platform smoke test before release
+88.5: GitHub Release (push + tag → CI builds 4-platform binaries)
+88.6: Verify CI release completed successfully
 ```
 
 ## 83E Audit Results & Scope Reduction

bench/history.yaml

@@ -985,3 +985,30 @@ entries:
       string_ops: {time_ms: 28, mem_mb: 23.2}
       multimethod_dispatch: {time_ms: 6, mem_mb: 12.0}
       real_workload: {time_ms: 10, mem_mb: 19.1}
+  - id: "0.3.0"
+    date: "2026-02-20"
+    reason: "v0.3.0 release baseline"
+    commit: "04eae14"
+    build: ReleaseSafe
+    backend: vm
+    results:
+      fib_recursive: {time_ms: 19, mem_mb: 11.2}
+      fib_loop: {time_ms: 4, mem_mb: 11.3}
+      tak: {time_ms: 8, mem_mb: 11.2}
+      arith_loop: {time_ms: 5, mem_mb: 11.2}
+      map_filter_reduce: {time_ms: 9, mem_mb: 12.2}
+      vector_ops: {time_ms: 8, mem_mb: 16.4}
+      map_ops: {time_ms: 5, mem_mb: 15.8}
+      list_build: {time_ms: 7, mem_mb: 12.2}
+      sieve: {time_ms: 6, mem_mb: 14.8}
+      nqueens: {time_ms: 17, mem_mb: 22.5}
+      atom_swap: {time_ms: 5, mem_mb: 11.3}
+      gc_stress: {time_ms: 28, mem_mb: 17.4}
+      lazy_chain: {time_ms: 6, mem_mb: 11.3}
+      transduce: {time_ms: 13, mem_mb: 11.3}
+      keyword_lookup: {time_ms: 15, mem_mb: 11.3}
+      protocol_dispatch: {time_ms: 6, mem_mb: 11.3}
+      nested_update: {time_ms: 12, mem_mb: 16.0}
+      string_ops: {time_ms: 27, mem_mb: 20.7}
+      multimethod_dispatch: {time_ms: 7, mem_mb: 11.3}
+      real_workload: {time_ms: 9, mem_mb: 18.7}