Added missing minver to solve validation errors due to minver/maxver derivation rules and defaults from RFC8794.

[peturingi]

RFC 8794

maxver MUST be greater than or equal to minver.

The minver attribute is OPTIONAL. If the minver attribute is not present, then the EBML Element has a minimum version of "1".

The maxver attribute is OPTIONAL. If the maxver attribute is not present, then the EBML Element has a maximum version equal to the value stored in the version attribute of EBMLSchema.

[Copilot]

Pull request overview

This PR fixes RFC 8794 validation errors in the EBML Matroska schema by ensuring all elements comply with the rule that maxver must be greater than or equal to minver. The schema version is 4, which means elements without explicit minver/maxver attributes default to minver=1 and maxver=4.

• Adds explicit minver="0" to deprecated elements (those with maxver="0") to satisfy the constraint
• Adds explicit maxver="5" to version 5 elements (those with minver="5") to satisfy the constraint

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