Update sig-directory.md

Adding myself to “Daml Language & Developer Tooling” and “Canton APIs (Ledger API, SQL API, Admin API)” SIGs

Development Fund Proposal Submission

Proposal file:
Link to the proposal added in this PR (e.g., /proposals/your-proposal-name.md)

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Summary

Briefly describe the proposal and the value it delivers to the Canton ecosystem (2–3 sentences).

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Checklist

• Proposal file added under /proposals/
• Milestones and funding amounts defined
• Acceptance criteria included
• Alignment with Canton priorities described

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Notes for Reviewers

(Add anything the Tech & Ops Committee should pay attention to.)