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_sst.go

@@ -0,0 +1,75 @@
+package commands
+
+import (
+	"fmt"
+	"log"
+	"os"
+
+	"code.tczkiot.com/srdb/sst"
+)
+
+// InspectSST 检查特定 SST 文件
+func InspectSST(sstPath string) {
+	// Check if file exists
+	info, err := os.Stat(sstPath)
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Printf("File: %s\n", sstPath)
+	fmt.Printf("Size: %d bytes\n", info.Size())
+
+	// Open reader
+	reader, err := sst.NewReader(sstPath)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer reader.Close()
+
+	// Get header
+	header := reader.GetHeader()
+	fmt.Printf("\nHeader:\n")
+	fmt.Printf("  RowCount: %d\n", header.RowCount)
+	fmt.Printf("  MinKey: %d\n", header.MinKey)
+	fmt.Printf("  MaxKey: %d\n", header.MaxKey)
+	fmt.Printf("  DataSize: %d bytes\n", header.DataSize)
+
+	// Get all keys using GetAllKeys()
+	allKeys := reader.GetAllKeys()
+	fmt.Printf("\nActual keys in file: %d keys\n", len(allKeys))
+	if len(allKeys) > 0 {
+		fmt.Printf("  First key: %d\n", allKeys[0])
+		fmt.Printf("  Last key: %d\n", allKeys[len(allKeys)-1])
+
+		if len(allKeys) <= 30 {
+			fmt.Printf("  All keys: %v\n", allKeys)
+		} else {
+			fmt.Printf("  First 15: %v\n", allKeys[:15])
+			fmt.Printf("  Last 15: %v\n", allKeys[len(allKeys)-15:])
+		}
+	}
+
+	// Try to get a specific key
+	fmt.Printf("\nTrying to get key 332:\n")
+	row, err := reader.Get(332)
+	if err != nil {
+		fmt.Printf("  Error: %v\n", err)
+	} else if row == nil {
+		fmt.Printf("  NULL\n")
+	} else {
+		fmt.Printf("  FOUND: seq=%d, time=%d\n", row.Seq, row.Time)
+	}
+
+	// Try to get key based on actual first key
+	if len(allKeys) > 0 {
+		firstKey := allKeys[0]
+		fmt.Printf("\nTrying to get actual first key %d:\n", firstKey)
+		row, err := reader.Get(firstKey)
+		if err != nil {
+			fmt.Printf("  Error: %v\n", err)
+		} else if row == nil {
+			fmt.Printf("  NULL\n")
+		} else {
+			fmt.Printf("  FOUND: seq=%d, time=%d\n", row.Seq, row.Time)
+		}
+	}
+}