refactor: finding the proper CollectionsElement model through reflection

[mehreenmansur]

• API: clearer mapping of param keys <-> element Models

• Models: robust method to get the associated Collection{Element} model from given element model without relying on naming assumptions (avoid string operation with table, column, reflections names)

• CollectionsCell-line: reuse available concern logic

[github-actions[bot]]

LCOV of commit 612d10c during Continuous Integration #2807

Summary coverage rate:
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[github-actions[bot]]

LCOV of commit 3875f27 during Continuous Integration #3145

Summary coverage rate:
  lines......: 64.1% (13645 of 21290 lines)
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[github-actions[bot]]

LCOV of commit 98b4976 during Continuous Integration #3148

Summary coverage rate:
  lines......: 64.1% (13645 of 21290 lines)
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  branches...: no data found

Files changed coverage rate: n/a

[github-actions[bot]]

LCOV of commit 6ed65c6 during Continuous Integration #3150

Summary coverage rate:
  lines......: 64.1% (13645 of 21290 lines)
  functions..: no data found
  branches...: no data found

Files changed coverage rate: n/a