chore: bump version to 1.5.0 in package.json, package-lock.json, and server.json

[SavioBS629]

Bumps version 1.4.2 → 1.5.0 in package.json, package-lock.json, and server.json ahead of release. Follows the same pattern as #427.

Minor bump aligns the stable line with the beta dist-tag, which is currently at 1.5.0-beta.18.

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