Fixes 7 review comments in one push:

* MCP stdio safety (#1, #5): read_import and compile_and_collect both
  print warnings/failures to stdout, which corrupts the JSON-RPC
  protocol stream when called from the MCP server. Add `quiet : bool
  = false` to both helpers (default preserves CLI behavior); MCP
  find_duplicates passes true and surfaces failure counts via the
  returned envelope.

* Test portability (#2, #3): replace hard-coded /tmp/... corpus path in
  test_find_duplicates_corpus_not_found with create_temp_file_result +
  immediate remove() — guaranteed-nonexistent path that works on
  Windows runners.

* Newline-delimited paths (#4): MCP do_find_duplicates now normalizes
  \n to , before parse_file_list, matching the README's
  documented "git diff --name-only | …" pipeline use case.

* Project (.das_project) plumbing (#6): add `project` to the
  find_duplicates schema, dispatch, and handler signature; thread
  through to compile_and_collect, which now takes
  `project : string = ""` and uses make_file_access(project) instead of
  the previous hardcoded "" — matching the convention used by
  compile_check / lint / find_symbol.

* Deterministic compile order (#7): both the MCP tool and CLI main.das
  build a sorted array<string> from `keys(against_files)` and iterate
  that, instead of the unspecified-order table-key iteration. Makes
  per-candidate report ordering and --check exit behavior reproducible
  across runs.

Drive-by: PERF006 fix in resolve_against_files (reserve before push
loop).

All test suites still green: 6987 in tests/, 54 find_dupes, 181 MCP
(includes 5 updated find_duplicates tests for new signature). MCP
end-to-end smoke confirms newline-delimited paths and project
parameter both reach the handler.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>