docs(security): add SECURITY.md with policy and PoC examples

.github/SECURITY.md

@@ -0,0 +1,235 @@
+# SECURITY POLICY
+
+SawitDB dibangun dengan fokus pada integritas data, konsistensi transaksi, dan kontrol akses berbasis role (POLRI).
+Setiap kerentanan akan ditangani secara terstruktur dan bertanggung jawab.
+
+---
+
+## SUPPORTED VERSIONS
+
+| Version | Status      |
+| ------- | ----------- |
+| 3.0.x   | Supported   |
+| < 3.0   | Unsupported |
+
+Catatan:
+
+* Versi 3.0 menggunakan WAL (Write-Ahead Logging), RBAC, dan Network Mode
+* Laporan untuk versi lama tetap diterima namun tidak dijamin diperbaiki
+
+---
+
+## REPORTING A VULNERABILITY
+
+Jangan publikasikan kerentanan secara langsung.
+
+Laporkan melalui:
+
+* GitHub Security Advisories 
+* Atau melalui issue 
+
+### Informasi wajib:
+
+1. Deskripsi kerentanan
+2. Dampak (impact)
+3. Langkah reproduksi
+4. Proof of Concept (PoC)
+5. Versi SawitDB
+6. Environment:
+
+   * OS
+   * Node.js version
+   * Mode (Single / Server / Cluster)
+
+---
+
+## SECURITY TESTING EXAMPLES (POC)
+
+Berikut contoh pengujian untuk mengidentifikasi potensi kerentanan.
+Semua testing wajib dilakukan secara lokal atau dengan izin.
+
+---
+
+### Authorization Bypass 
+
+```javascript
+const { SawitClient } = require("@wowoengine/sawitdb");
+
+(async () => {
+  const client = new SawitClient("sawitdb://127.0.0.1:7878");
+
+  await client.connect("guest", "guest123");
+
+  try {
+    const result = await client.query(
+      "SELECT * FROM users WHERE role = 'admin'"
+    );
+
+    console.log("UNEXPECTED DATA:", result);
+  } catch (err) {
+    console.error("EXPECTED ERROR:", err.message);
+  }
+})();
+```
+
+---
+
+### Query Injection (Parser Edge Case)
+
+```javascript
+const payload = "admin' OR '1'='1";
+
+const query = `
+  SELECT * FROM users
+  WHERE username = '${payload}'
+`;
+
+console.log(query);
+
+const result = db.query(query);
+console.log(result);
+```
+
+---
+
+### WAL Consistency (Crash Test)
+
+```javascript
+const db = new SawitDB("./test.sawit");
+
+db.query("CREATE TABLE logs");
+db.query("BEGIN TRANSACTION");
+
+for (let i = 0; i < 1000; i++) {
+  db.query(`INSERT INTO logs (msg) VALUES ('log-${i}')`);
+}
+
+// Force crash
+process.exit(1);
+```
+
+
+```javascript
+const db = new SawitDB("./test.sawit");
+
+const result = db.query("SELECT COUNT(*) FROM logs");
+
+console.log(result);
+```
+
+
+---
+
+### Race Condition (Worker Thread)
+
+```javascript
+const { SawitClient } = require("@wowoengine/sawitdb");
+
+(async () => {
+  const client = new SawitClient("sawitdb://127.0.0.1:7878");
+
+  await client.connect("admin", "admin123");
+
+  const tasks = [];
+
+  for (let i = 0; i < 50; i++) {
+    tasks.push(
+      client.query(
+        "UPDATE products SET stock = stock + 1 WHERE id = 1"
+      )
+    );
+  }
+
+  await Promise.all(tasks);
+
+  const result = await client.query(
+    "SELECT stock FROM products WHERE id = 1"
+  );
+
+  console.log(result);
+})();
+```
+
+
+---
+
+### Memory Stress / Cache Abuse
+
+```javascript
+const db = new SawitDB("./stress.sawit");
+
+db.query("CREATE TABLE bigdata");
+
+for (let i = 0; i < 100000; i++) {
+  db.query(`INSERT INTO bigdata (value) VALUES ('data-${i}')`);
+}
+
+const result = db.query("SELECT * FROM bigdata");
+
+console.log("ROWS:", result.length);
+```
+
+
+---
+
+## RESPONSE PROCESS
+
+* Respon awal: 3–7 hari
+* Validasi teknis
+* Klasifikasi severity
+* Patch development
+* Security advisory / release
+
+Semua laporan diverifikasi secara objektif.
+
+---
+
+## DISCLOSURE POLICY
+
+* Tidak menyebarkan exploit sebelum patch
+* Koordinasi dengan maintainer
+* Mengikuti responsible disclosure
+
+Pelapor dapat:
+
+* Dicantumkan sebagai security contributor
+* Atau tetap anonim
+
+---
+
+## SCOPE
+
+### Termasuk:
+
+* Authentication / authorization bypass
+* RCE (Remote Code Execution)
+* Query / parser exploit
+* Data corruption (WAL / paging)
+* Race condition
+* Memory issue yang berdampak keamanan
+* Network protocol abuse (sawitdb://)
+
+### Tidak termasuk:
+
+* Bug minor tanpa impact
+* Misconfiguration user
+* Issue performa
+* Social engineering
+
+---
+
+## PROHIBITED ACTIONS
+
+* Akses data tanpa izin
+* Testing di server publik tanpa persetujuan
+* Eksploitasi di luar ruang lingkup penelitian
+
+Pengujian harus bertanggung jawab dan terkendali.
+
+
+## ACKNOWLEDGEMENT
+
+Kontributor yang melaporkan kerentanan valid dapat dicantumkan sebagai security contributor.
+
+---
+