fix: upgrade golang.org/x/crypto and golang.org/x/net for security alerts

[gmegidish]

Fixes Dependabot alerts:

• #49 (critical): golang.org/x/crypto — VerifiedPublicKeyCallback permissions skip enforcement. Upgraded v0.45.0 → v0.52.0.
• #45 (medium): golang.org/x/net — HTML parser denial of service. Upgraded v0.47.0 → v0.55.0.

go mod tidy also bumped transitive golang.org/x deps (mod, sync, sys, text, tools).

Test plan

• go build ./... passes
• go test ./... passes

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Configuration used: Organization UI

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📥 Commits

Reviewing files that changed from the base of the PR and between 3fbe544 and f51b44f.

⛔ Files ignored due to path filters (1)

• go.sum is excluded by !**/*.sum

📒 Files selected for processing (1)

• go.mod

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/upgrade-x-crypto-x-net

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