Check the repository initialization when the program starts

[draftcode]

Currently, the repository initialization is checked deeper in the
program. Instead, this change checks that when we open the database.

[aviator-app]

Current Aviator status

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Stack

1. 👉 Check the repository initialization when the program starts #282 👈 (this pr)

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[aviator-app]

FlexReview Summary

Based on the code complexity and the author's expertise score, these are the suggested reviewers:

• @jainankit (current review load: 2)

See the list of alternate reviewers in the detailed breakdown below.

Detailed Breakdown

Author’s expertise score for the modified files:

• cmd/av/fetch.go (1.00)
• cmd/av/helpers.go (1.00)
• cmd/av/init.go (1.00)
• cmd/av/pr_queue.go (1.00)
• cmd/av/pr_status.go (1.00)
• internal/actions/errors.go (1.00)
• internal/actions/pr.go (1.00)
• internal/actions/pr_test.go (1.00)
• internal/git/gittest/repo.go (1.00)
• internal/meta/db.go (1.00)
• internal/meta/jsonfiledb/db.go (1.00)
• internal/meta/jsonfiledb/db_test.go (1.00)
• internal/meta/jsonfiledb/readtx.go (1.00)
• internal/meta/refmeta/import.go (1.00)
• internal/meta/refmeta/repository.go (1.00)

Files	Reviewers
cmd/av/fetch.go †, cmd/av/helpers.go †, cmd/av/init.go †, cmd/av/pr_queue.go †, cmd/av/pr_status.go †, internal/actions/pr.go †, internal/actions/pr_test.go †, internal/git/gittest/repo.go †, internal/meta/db.go †, internal/meta/jsonfiledb/db.go †, internal/meta/refmeta/import.go †, internal/meta/refmeta/repository.go †	@jainankit (score: 0.57, current review load: 2)

† Indicates that the file doesn't need an expert review. (?)

See full breakdown of the reviewers on the Aviator webapp.