docs(version): 补齐270条历史开发版本说明

按权威 version→commit 映射，为缺失开发版本增加 exact-SHA CHANGELOG 块。
正文采用该提交新增 CHANGELOG 或真实 commit body/diff 归纳，已有82条不改。
新增270条绑定验收与错SHA拒绝测试，不改变版本计算与同步实现。

internal/versionhistory/development_notes_history_test.go

@@ -0,0 +1,54 @@
+package versionhistory
+
+import (
+	"encoding/json"
+	"os"
+	"strings"
+	"testing"
+
+	"knowledge-governance/internal/governance"
+)
+
+func TestAllHistoricalDevelopmentNotesBindExactCommit(t *testing.T) {
+	changelogBytes, err := os.ReadFile("../../CHANGELOG.md")
+	if err != nil {
+		t.Fatal(err)
+	}
+	changelog := string(changelogBytes)
+	fixtureBytes, err := os.ReadFile("testdata/development_notes_history.json")
+	if err != nil {
+		t.Fatal(err)
+	}
+	var entries []struct {
+		Version string `json:"version"`
+		SHA     string `json:"sha"`
+	}
+	if err := json.Unmarshal(fixtureBytes, &entries); err != nil {
+		t.Fatal(err)
+	}
+	if len(entries) != 270 {
+		t.Fatalf("history fixture must contain 270 missing development versions, got %d", len(entries))
+	}
+	seen := map[string]string{}
+	wrong := strings.Repeat("f", 40)
+	for _, entry := range entries {
+		if prev, ok := seen[entry.Version]; ok && prev != entry.SHA {
+			t.Fatalf("version %s bound to multiple commits", entry.Version)
+		}
+		seen[entry.Version] = entry.SHA
+		notes := governance.ExtractDevelopmentNotesForCommit(changelog, entry.Version, entry.SHA)
+		if strings.TrimSpace(notes) == "" {
+			t.Fatalf("version %s sha %s has no exact-SHA notes", entry.Version, entry.SHA)
+		}
+		if strings.Contains(notes, "目标提交："+entry.SHA) == false {
+			t.Fatalf("version %s body does not carry its exact target line", entry.Version)
+		}
+		if leaked := governance.ExtractDevelopmentNotesForCommit(changelog, entry.Version, wrong); leaked != "" {
+			t.Fatalf("version %s notes leaked to wrong SHA: %q", entry.Version, leaked)
+		}
+	}
+	// 相邻/前缀版本不能互相命中。
+	if notes := governance.ExtractDevelopmentNotesForCommit(changelog, "0.1.35", entries[0].SHA); notes != "" {
+		t.Fatalf("0.1.35 leaked notes for another commit: %q", notes)
+	}
+}

internal/versionhistory/development_notes_plain_test.go

@@ -70,8 +70,8 @@ func TestRealChangelogDevelopmentNotes(t *testing.T) {
 		if notes == "" || !strings.Contains(notes, tc.want) {
 			t.Fatalf("real CHANGELOG %s notes missing: %q", tc.version, notes)
 		}
-		if governance.ExtractDevelopmentNotes(changelog, "0.1.35") != "" {
-			t.Fatal("prefix version matched a longer version")
+		if other := governance.ExtractDevelopmentNotes(changelog, "0.1.35"); strings.Contains(other, "首次同步可复用") || strings.Contains(other, "索引预检") {
+			t.Fatalf("0.1.35 matched a longer version's body: %q", other)
 		}
 	}
 }