major: kestrel is now a tak server (#6)

## Added

- CoT (Cursor on Target) server on port 8089 enabling ATAK/iTAK device connectivity
- Support for TAK stream protocol and traditional XML CoT messages
- TLS/SSL support with automatic fallback to plain TCP
- Username/password authentication for CoT connections
- Real-time device position tracking with TTL-based expiration (90s default)
- API endpoints: `/api/cot/config`, `/api/cot/server-package`, `/api/cot/truststore`, `/api/me/cot-password`
- TAK Server section in Settings with QR code for iTAK setup
- ATAK password management in Account page for OIDC users
- CoT device markers on map showing real-time positions
- Comprehensive documentation in `docs/` directory
- Environment variables: `COT_PORT`, `COT_TTL_MS`, `COT_REQUIRE_AUTH`, `COT_SSL_CERT`, `COT_SSL_KEY`, `COT_DEBUG`
- Dependencies: `fast-xml-parser`, `jszip`, `qrcode`

## Changed

- Authentication system supports CoT password management for OIDC users
- Database schema includes `cot_password_hash` field
- Test suite refactored to follow functional design principles

## Removed

- Consolidated utility modules: `authConfig.js`, `authSkipPaths.js`, `bootstrap.js`, `poiConstants.js`, `session.js`

## Security

- XML entity expansion protection in CoT parser
- Enhanced input validation and SQL injection prevention
- Authentication timeout to prevent hanging connections

## Breaking Changes

- Port 8089 must be exposed for CoT server. Update firewall rules and Docker/Kubernetes configurations.

## Migration Notes

- OIDC users must set ATAK password via Account settings before connecting
- Docker: expose port 8089 (`-p 8089:8089`)
- Kubernetes: update Helm values to expose port 8089

Co-authored-by: Madison Grubb <madison@elastiflow.com>
Reviewed-on: #6

server/api/users.post.js

@@ -1,4 +1,4 @@
-import { getDb } from '../utils/db.js'
+import { getDb, withTransaction } from '../utils/db.js'
 import { requireAuth } from '../utils/authHelpers.js'
 import { hashPassword } from '../utils/password.js'
 
@@ -21,18 +21,20 @@ export default defineEventHandler(async (event) => {
     throw createError({ statusCode: 400, message: 'role must be admin, leader, or member' })
   }
 
-  const { run, get } = await getDb()
-  const existing = await get('SELECT id FROM users WHERE identifier = ?', [identifier])
-  if (existing) {
-    throw createError({ statusCode: 409, message: 'Identifier already in use' })
-  }
+  const db = await getDb()
+  return withTransaction(db, async ({ run, get }) => {
+    const existing = await get('SELECT id FROM users WHERE identifier = ?', [identifier])
+    if (existing) {
+      throw createError({ statusCode: 409, message: 'Identifier already in use' })
+    }
 
-  const id = crypto.randomUUID()
-  const now = new Date().toISOString()
-  await run(
-    'INSERT INTO users (id, identifier, password_hash, role, created_at, auth_provider, oidc_issuer, oidc_sub) VALUES (?, ?, ?, ?, ?, ?, ?, ?)',
-    [id, identifier, hashPassword(password), role, now, 'local', null, null],
-  )
-  const user = await get('SELECT id, identifier, role, auth_provider FROM users WHERE id = ?', [id])
-  return user
+    const id = crypto.randomUUID()
+    const now = new Date().toISOString()
+    await run(
+      'INSERT INTO users (id, identifier, password_hash, role, created_at, auth_provider, oidc_issuer, oidc_sub) VALUES (?, ?, ?, ?, ?, ?, ?, ?)',
+      [id, identifier, hashPassword(password), role, now, 'local', null, null],
+    )
+    const user = await get('SELECT id, identifier, role, auth_provider FROM users WHERE id = ?', [id])
+    return user
+  })
 })