fix: SDK update for version 8.3.1

[ChiragAgg5k]

This PR contains updates to the SDK for version 8.3.1.

What's Changed

• Fixed: added ProjectAuthMethodId.Passkey, so project.updateAuthMethod can enable passkeys
• Fixed: added ProjectPolicyId.Passkey and the PolicyPasskey model, so getPolicy and listPolicies return the passkey policy

Completes the passkeys release: the previous patch shipped the passkey methods, but not the passkey auth method and policy IDs or the PolicyPasskey model, so the SDK could not enable passkeys on a project. Made the same way, from a spec with exactly these pieces removed, three-way merged onto main. Verified live: updateAuthMethod(passkey), getPolicy(passkey) and listPolicies against Appwrite Cloud.

[hansi-codes]

🟢 Tier S · Ready to merge

This update releases the .NET SDK as version 8.3.1 and adds the passkey auth-method and policy identifiers. It also adds the PolicyPasskey model and uses it when GetPolicy returns the passkey policy.

Verdict	New comments	Fixed	Still open
✅ Approved	0	0	0

📂 Walkthrough · 8

File	Change
Appwrite/Appwrite.csproj	Bumps the package version to 8.3.1.
Appwrite/Client.cs	Updates the SDK version sent in the user-agent and SDK-version headers.
Appwrite/Enums/ProjectAuthMethodId.cs	Adds the passkey auth-method identifier.
Appwrite/Enums/ProjectPolicyId.cs	Adds the passkey policy identifier.
Appwrite/Models/PolicyPasskey.cs	Adds a model for passkey policy configuration.
Appwrite/Services/Project.cs	Maps passkey responses from GetPolicy to PolicyPasskey.
CHANGELOG.md	Documents the 8.3.1 passkey updates.
README.md	Updates package installation examples to version 8.3.1.

---

_{Reviewed 49d93e9 · Details · Comment @hansi-codes review to re-run, or mention @hansi-codes with a question.}

[hansi-codes]

🟢 Tier S · Looks good to merge. Summary