fix: Set zIndex for DropdownContainer in BedrockEmbeddingProvider and initialize langfuse during extension activation

[magesh-presidio]

Description

• Fix dropdown layering issues in BedrockEmbeddingProvider by setting an appropriate zIndex on DropdownContainer.
• Initialize langfuse during extension activation

Type of Change

• 🐛 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 not work as expected)
• ♻️ Refactor Changes
• 💅 Cosmetic Changes
• 📚 Documentation update
• 🏃 Workflow Changes

Pre-flight Checklist

• Changes are limited to a single feature, bugfix, or chore (split larger changes into separate PRs)
• Tests are passing (npm test) and code is formatted and linted (npm run format && npm run lint)
• I have created a changeset using npm run changeset (required for user-facing changes)
• I have reviewed contributor guidelines

[changeset-bot]

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Latest commit: e5b11bb

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