Add repo-hardening foundation

- MIT LICENSE
- CODEOWNERS pointing at @adibhanna for all paths
- SECURITY.md with private vulnerability reporting guidance
- Dependabot config for npm and github-actions updates

Author: adibhanna

.github/CODEOWNERS

@@ -0,0 +1,3 @@
+# Every change requires review from a listed code owner.
+# See https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-security/customizing-your-repository/about-code-owners
+* @adibhanna

.github/dependabot.yml

@@ -0,0 +1,19 @@
+version: 2
+updates:
+  - package-ecosystem: npm
+    directory: /
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 10
+    labels:
+      - dependencies
+      - npm
+
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 5
+    labels:
+      - dependencies
+      - github-actions

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Adib Hanna and ZenNotes contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

SECURITY.md

@@ -0,0 +1,22 @@
+# Security Policy
+
+## Supported Versions
+
+We support the latest published release of ZenNotes. Security fixes land on
+`main` first and roll into the next release.
+
+## Reporting a Vulnerability
+
+**Please do not open a public GitHub issue for security vulnerabilities.**
+
+Report issues privately through GitHub's [private vulnerability reporting
+form](https://github.com/ZenNotes/zennotes/security/advisories/new) for this
+repository. Include:
+
+- A description of the issue and the impact
+- Steps to reproduce or a proof of concept
+- Affected versions, if known
+- Any suggested remediation
+
+We aim to acknowledge reports within 3 business days and to ship a fix or
+publish a coordinated advisory within 30 days of confirmation.