dep_search_explicit_dep_project_name created nonexistent.db via
resolve_store → cbm_store_open_path(SQLITE_OPEN_CREATE), causing
tool_delete_project_not_found to find the file and return "deleted"
instead of "not_found".
Fix: use unique name "_tc_deptest_proj_" + unlink cleanup after test.
2178 tests passing.
Signed-off-by: Andrew Hundt <ATHundt@gmail.com>