Add row segment operations to user-story-03-submission.md documentation

[Copilot]

The submission user story documentation omitted row segment functionality - operations for annotating portions of character state matrix sequences with specimen data, accession numbers, and geographic information.

Changes

Discovered 8 row segment operations from treebase-servlet.xml URL mappings and integrated them into all relevant documentation sections:

• Current Pages: Added row segment pages (matrixRowSegmentList, matrixRowSegmentForm, uploadRowSegmentData, rowSegmentDataTable, viewAllRowSegmentData, exportRowSegmentData, exportRowSegmentTemplate, deleteARowSegment)

• Navigation Flow: New RowSegments subgraph in mermaid diagram with paths for:

  • Individual entry: MatrixRows → RowSegmentList → RowSegmentForm
  • Bulk upload: MatrixList → UploadRowSegment → RowSegmentDataTable → ViewAllRowSegments

• Submission Workflow: New "Step 4a: Row Segment Data" section covering:

  • Individual row segment entry via form with interactive segment selection
  • Bulk upload via tab-delimited files with column mapping
  • Export/template functionality for data exchange

• Pages to Account For: 8 new entries in controller mapping table

• Validation/Security: Row segment coordinate validation rules and WRITE permission requirements

Original prompt

The description of the data submission user story at https://github.com/TreeBASE/treebase/blob/v3-ui-ux/doc/v3/user-story-03-submission.md omits the functionality of submitting 'row segments', i.e. parts of sequences within character state matrices. Do the following:

• navigate through the submission code paths to discover the row segment operations that are reachable and configured in treebase-servlet.xml
• infer from these, what row segment operations are possible
• weave these operations into the Current Pages section, the Navigation Flow mermaid plot, the Submission workflow and the Pages accounted for

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