Regarding information about the guardian's coordinates. We must not allow ourselves to be confused, including the prosecutor. Otherwise, sometimes the guardianship refers to the federal law on PD ("the guardian does not want"), and many (including prosecutors) melt down from helplessness. But there is no "guardianship secret", and besides: there is a direct law on the right to know information concerning civil rights. (In this case, for example, the citizen has the right to file a claim to remove the restriction, which (as our Supreme Court added to the law) is submitted to the guardian, and for that its data is needed). You write: "According to Article 2, Article 24 of the Constitution of the Russian Federation, state authorities and local self-government bodies, their officials are obliged to provide everyone with the opportunity to familiarize themselves with documents and materials that directly affect their rights and freedoms.
Section 25 of the Federal Law dated 02/09/2009 No. 8-FZ "On ensuring access to information about the activities of state bodies and local self-government bodies" (hereinafter FZ-8/09) extends this responsibility of state authorities and local self-government to organizations subordinate to them, discipline and civil liability. Violation of the right to access information. Section 6 of Article 6, Sections 18-19 of the Federal Law-8/09 states that information is provided upon request.
According to Clause 3 of Article 21 of the Federal Law-8/09, Clause 2 of Part 8 of Article 8 of the Federal Law of July 27, 2006 No. 149-FZ "On Information, Information Technologies and Information Protection", information affecting the rights and obligations of the interested party established by the legislation of the Russian Federation is provided free of charge. Then - say how the information you need relates to your rights and ask for it.