Site-free acquired mosaic fails automatic viewer publication and compiled table-schema reconciliation #728

Active integration owner: Singer, following the currently assigned serial engineering94 receiving. No SCI runtime changes, replay or author feedback.

Original receiving09 case retained by parent: next-p001-fresh09-89-20261005/P001_FRESH9SITE09_89, candidate01-technical01.py. Parent durable receipt: /home/ts/wt/openhcs-artifact-planning-publication-315-20260930/figure-collection-20261004/P001-FRESH09-AGGREGATE-PUBLICATION-DEFECT.rst.

Original native log openhcs_zmq_server_port_6022_1791161109181500137.log lines1072–1103: finalize_function_step_outputs → ArtifactMaterializationTargetPlan → ArtifactOutputBatch._output_fields → StreamViewerComponentMetadataProjector.project_required rejects missing site. The acquired mosaic legitimately retains well/channel/Z/time/source alias/XY calibration and contributor provenance without one acquired site.

Distinct candidate01t02 numerical COMPLETE with automatic streaming disabled then records ToolExecutionError: compiled table expectation rejects neurite_outgrowth_cells_step3_details.csv missing schema fields (site, source_image_name). This is a header/schema mismatch, NOT yet proof a scalar site must be invented, and the earliest common wrong source/scope fact is not yet established.

Current open claims/issue search found no exact active implementation. Related historical #515/#523/#435/#630 are closed. #620 concerns named Reverse ImageMath automatic metadata conflict, fixed in #626; #529 concerns source_binding/runtime_slice publication axes. Do not merge these different repros or wait on closed #394 as an owner queue. Planck NamedSourceBinding/photometry work remains separate; shared hunks are being coordinated directly before editing.

Acceptance: tiny synthetic multi-site source through ordinary compile/execute/finalization, automatic viewer publication and receipt-backed aggregate reopening; preserve source frame/contributors/lineage, exact pixels/calibration and original typed row/CSV scope consistency. Keep scalar-field behavior and genuine incomplete acquired-source rejection strict. No fake site/name, mirrored store, guessed filename reader, alternate codec, relaxed guard or timeout changes. Original failed scientific jobs and all artifacts are immutable; no biological acceptance claim. Existing metadata/display/export owners and full related AST consumer closure precede implementation; actual installed receiving follows coherent source qualification.