fix: Multiple tag selections for dedup key in parameterized evetns

[kushagra0902]

Description

Migrations for removing multiple dedup keys and bugged import path from importer is fixed so to take jsut the first index for keys.

Related Issue

#478

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Non-functional change (docs, style, minor refactor)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my code changes.
• I added a changeset, or this is docs-only and I added an empty changeset.
• All new and existing tests passed.

[Copilot]

Pull request overview

Fixes NIP-33 parameterized replaceable event deduplication handling so only the first d tag value is used (matching expected spec behavior), and normalizes existing stored data accordingly.

Changes:

• Normalize importer-side deduplication enrichment to store only the first d tag value.
• Add a migration to collapse existing event_deduplication arrays to a single value and delete now-duplicate rows.
• Add a unit test to ensure batch persistence normalizes parameterized deduplication to a single key.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
test/unit/services/event-import-service.spec.ts	Adds a unit test asserting parameterized deduplication is reduced to the first d tag value during batch persistence.
src/services/event-import-service.ts	Changes parameterized dedup extraction to use only the first d tag value and stores it as a single-element array.
migrations/20260419_140000_normalize_parameterized_deduplication.js	Normalizes existing DB rows to single-value dedup keys and removes duplicates that would conflict after normalization.

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[coveralls]

coverage: 69.016% (+0.7%) from 68.308% — kushagra0902:dedupFix into cameri:main