Initial commit: SRDB - High-performance LSM-Tree database

- Core engine with MemTable, SST, WAL
- B+Tree indexing for SST files  
- Leveled compaction strategy
- Multi-table database management
- Schema validation and secondary indexes
- Query builder with complex conditions
- Web UI with HTMX for data visualization
- Command-line tools for diagnostics

examples/webui/commands/inspect_all_sst.go

@@ -0,0 +1,72 @@
+package commands
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"sort"
+	"strconv"
+	"strings"
+
+	"code.tczkiot.com/srdb/sst"
+)
+
+// InspectAllSST 检查所有 SST 文件
+func InspectAllSST(sstDir string) {
+	// List all SST files
+	files, err := os.ReadDir(sstDir)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	var sstFiles []string
+	for _, file := range files {
+		if strings.HasSuffix(file.Name(), ".sst") {
+			sstFiles = append(sstFiles, file.Name())
+		}
+	}
+
+	sort.Strings(sstFiles)
+
+	fmt.Printf("Found %d SST files\n\n", len(sstFiles))
+
+	// Inspect each file
+	for _, filename := range sstFiles {
+		sstPath := filepath.Join(sstDir, filename)
+
+		reader, err := sst.NewReader(sstPath)
+		if err != nil {
+			fmt.Printf("%s: ERROR - %v\n", filename, err)
+			continue
+		}
+
+		header := reader.GetHeader()
+		allKeys := reader.GetAllKeys()
+
+		// Extract file number
+		numStr := strings.TrimPrefix(filename, "000")
+		numStr = strings.TrimPrefix(numStr, "00")
+		numStr = strings.TrimPrefix(numStr, "0")
+		numStr = strings.TrimSuffix(numStr, ".sst")
+		fileNum, _ := strconv.Atoi(numStr)
+
+		fmt.Printf("File #%d (%s):\n", fileNum, filename)
+		fmt.Printf("  Header: MinKey=%d MaxKey=%d RowCount=%d\n", header.MinKey, header.MaxKey, header.RowCount)
+		fmt.Printf("  Actual: %d keys", len(allKeys))
+		if len(allKeys) > 0 {
+			fmt.Printf(" [%d ... %d]", allKeys[0], allKeys[len(allKeys)-1])
+		}
+		fmt.Printf("\n")
+
+		// Check if header matches actual keys
+		if len(allKeys) > 0 {
+			if header.MinKey != allKeys[0] || header.MaxKey != allKeys[len(allKeys)-1] {
+				fmt.Printf("  *** MISMATCH: Header says %d-%d but file has %d-%d ***\n",
+					header.MinKey, header.MaxKey, allKeys[0], allKeys[len(allKeys)-1])
+			}
+		}
+
+		reader.Close()
+	}
+}