chore(deps): bump go.uber.org/mock from 0.5.2 to 0.6.0

[nieblara]

Requirements

• I have added test coverage for new or changed functionality
• I have followed the repository's pull request submission guidelines
• I have validated my changes against all supported platform versions

Related issues

Resolves the merge conflicts on #621 (dependabot/go_modules/go.uber.org/mock-0.6.0). That PR is CONFLICTING against main (88 commits behind).

Describe the solution you've provided

Re-applies only the intended direct bump on current main:

• go.uber.org/mock v0.5.2 → v0.6.0
• Matching go.sum checksums only

The original PR also tried to move golang.org/x/{term,mod,net,sys,tools} to versions that are now older than main. Those hunks were dropped so this does not downgrade:

• golang.org/x/term stays v0.40.0
• golang.org/x/mod stays v0.33.0
• golang.org/x/net stays v0.50.0
• golang.org/x/sys stays v0.41.0
• golang.org/x/tools stays v0.42.0

No application source or mockgen changes. go.uber.org/mock v0.6.0 is API-compatible here.

Describe alternatives you've considered

Merging the Dependabot branch and hand-resolving go.mod/go.sum conflict markers. Recreating the bump on latest main is smaller and avoids replaying stale transitive pins.

Additional context

go build succeeded. Packages that import mock (internal/dev_server/sdk, model, adapters) passed. Original PR 621 can be closed once this lands.