Fix for --version in osctrl-admin

[javuto]

Fix for osctrl-admin to print out the version and exit when issuing the -v, --version flag. Also adding metadata to build.

[Copilot]

Pull Request Overview

This PR fixes the --version flag functionality in osctrl-admin by adding proper version handling and build metadata. The changes ensure that when users run osctrl-admin --version or osctrl-admin -v, the application prints version information and exits instead of starting the full service.

• Adds build-time metadata variables for version, commit, and date information
• Implements custom version printer and flag handling similar to other services
• Restructures application flow to prevent service initialization for version/help commands
• Updates build configuration to include version metadata in compiled binaries

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
cmd/admin/main.go	Adds version metadata variables, custom version printer, and restructures main flow to handle version flag properly
cmd/tls/main.go	Removes unnecessary blank lines for consistency
Makefile	Updates admin build targets to include build arguments with version metadata
.goreleaser.yml	Updates ldflags to use correct variable names for build metadata injection

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