feat(seo): discoverability + Schema.org + IndexNow + Trivy (#1)

public/.well-known/security.txt

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+Contact: mailto:admin@pushkinohistory.ru
+Contact: https://pushkinohistory.ru/privacy/
+Expires: 2027-05-21T00:00:00.000Z
+Preferred-Languages: ru, en
+Canonical: https://pushkinohistory.ru/.well-known/security.txt
+Policy: https://pushkinohistory.ru/privacy/

public/9018cf11050b4f379b8cec01ae3239bb.txt

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+9018cf11050b4f379b8cec01ae3239bb

public/humans.txt

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+/* SITE */
+Site: История города Пушкино — pushkinohistory.ru
+Last update: 2026-05-21
+Standards: HTML5, CSS3, RSS 2.0
+Components: Astro 6, nginx 1.29
+Software: Docker, Gitea Actions
+
+/* TEAM */
+Maintained by: HHIVP
+Contact: admin@pushkinohistory.ru