edge-sync updates

[gertd]

• consolidate the usage of the validator to a single pre-allocated shared instance on the directory instance
• update schemaVersion.schemaVersion from 0.0.4 to 0.0.6
• make directory a singleton

[github-actions]

Pull Request Test Coverage Report for Build 8639354749

Details

• 110 of 175 (62.86%) changed or added relevant lines in 8 files are covered.
• 7 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.7%) to 31.713%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/directory/v3/writer.go	13	15	86.67%
pkg/directory/v3/exporter.go	4	7	57.14%
pkg/datasync/datasync.go	0	4	0.0%
pkg/bdb/metadata.go	21	27	77.78%
pkg/directory/v3/reader.go	10	16	62.5%
pkg/directory/directory.go	43	50	86.0%
pkg/directory/v3/importer.go	4	16	25.0%
pkg/bdb/generic.go	15	40	37.5%

Files with Coverage Reduction	New Missed Lines	%
pkg/bdb/metadata.go	1	80.43%
pkg/bdb/migrate/mig004/migrate.go	6	0.0%

Totals
Change from base Build 8510317706:	0.7%
Covered Lines:	1181
Relevant Lines:	3724

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💛 - Coveralls