Update repository resource tests to work with refactored codebase

[Copilot]

Summary

Updates test code to use current dependency injection pattern after codebase refactoring changed from function-based to context-based dependency management.

Why

Tests were failing due to API mismatch after main branch merged significant architectural changes. The original panic fix remains intact, but test infrastructure needed updating.

What changed

• Updated Test_repositoryResourceContentsHandler_NetworkError to use BaseDeps and ContextWithDeps instead of deprecated function injection
• Fixed template getter tests to access tmpl.Template.URITemplate (reflects new ServerResourceTemplate structure)
• Removed obsolete function parameters from test assertions
• Added missing translations import

MCP impact

• No tool or API changes

Security / limits

• No security or limits impact

Tool renaming

• I am not renaming tools as part of this PR

Lint & tests

• Linted locally with ./script/lint
• Tested locally with ./script/test

Docs

• Not needed

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