chore: upgrade to appwrite sdk-for-go v6 (6.0.0)

[levivannoort]

Summary

Upgrades the Appwrite Go SDK from v5 to v6.0.0 across the whole provider.

• github.com/appwrite/sdk-for-go/v5 v5.1.0 → .../v6 v6.0.0
• Updated all import paths in the provider, common helpers, and every service.
• Bumped the Go toolchain to match.

Import-path-only change; go build ./... passes.

🤖 Generated with Claude Code

[greptile-apps]

Greptile Summary

This PR upgrades the Appwrite Go SDK dependency across the entire provider from sdk-for-go/v5 v5.1.0 to sdk-for-go/v6 v6.0.0, updating all 32 import paths and the Go toolchain version.

• All service files (backup, bucket, column, database, file, function, provider, row, site, subscriber, table, team, topic, user, webhook) have their imports mechanically updated from /v5 to /v6.
• column/resource.go intentionally retains the now-deprecated CreateStringColumn and UpdateStringColumn calls (suppressed with //nolint:staticcheck) because the replacement TextColumn API lacks a size parameter; explanatory comments are included at both call sites.
• go.mod and go.sum are updated consistently with matching checksums for the new module path.

Confidence Score: 5/5

Safe to merge — all changes are mechanical import-path updates with one well-justified and commented exception in the column resource.

The upgrade touches 32 files but every change is a one-line import path substitution from /v5 to /v6. The single substantive deviation — keeping the deprecated CreateStringColumn/UpdateStringColumn calls — is explicitly documented and suppressed at both sites, with a clear migration path noted. No logic, data flow, or API surface was altered beyond what the SDK version upgrade requires.

No files require special attention. internal/services/column/resource.go warrants a follow-up once the upstream SDK's TextColumn gains a size parameter, but it is handled correctly for now.

Important Files Changed

Filename	Overview
go.mod	SDK dependency bumped from sdk-for-go/v5 v5.1.0 to v6 v6.0.0; Go toolchain bumped from 1.25.0 to 1.26.5
go.sum	Checksum entries replaced for the new sdk-for-go/v6 module; all other checksums unchanged
internal/services/column/resource.go	Import path updated to v6; CreateStringColumn and UpdateStringColumn intentionally kept despite deprecation (TextColumn lacks size parameter), with explanatory comments and nolint directives
internal/common/helpers.go	Import paths updated from sdk-for-go/v5 to v6; no functional changes
internal/provider/provider.go	Import paths updated from sdk-for-go/v5 to v6; no functional changes
internal/services/backup/resource.go	Import paths updated to sdk-for-go/v6; no functional changes
internal/services/function/deployment_resource.go	Import paths updated to sdk-for-go/v6; no functional changes
internal/services/site/deployment_resource.go	Import paths updated to sdk-for-go/v6; no functional changes

_{Reviews (2): Last reviewed commit: "chore: drop ponytail prefix from lint co..." | Re-trigger Greptile}