Fix runtime regressions and synchronize managed model catalogs

[wangtsiao]

Summary

• surface context-compaction lifecycle events and stabilize provider retry/error handling
• simplify unified command responses, rename process handles, and clean up model-visible command output
• synchronize managed user model catalogs while preserving customized and pinned entries
• add end-to-end coverage proving update_goal completion stops autonomous continuation

Testing

• cargo test -p devo-core --lib
• cargo test -p devo-core --test context_limit_compaction
• cargo test -p devo-provider --test openai_chat_completions_stream
• cargo test -p devo-server --lib
• cargo test -p devo-server --test model_config_e2e --test unified_exec_tool_e2e --test goal_update_completion
• cargo test -p devo-cli
• cargo test -p devo-tui --lib
• changed Desktop compaction test and all Desktop SDK client tests
• cargo fmt --all -- --check
• git diff --check

Desktop full type checking still reports three pre-existing origin/main errors in untouched files: unused _props, unused ReasoningPart, and unsupported collaborationMode.