Add the MEOS-operator generator for the NebulaStream codegen path#21

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estebanzimanyi:design/nebula-meos-codegen-tracer

Commits on Jun 11, 2026

fix(ci): make the Nix build work with NES_ENABLE_MEOS=OFF and stock paho-mqtt-cpp
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feat(berlinmod): scaffold the full BerlinMOD-9 × 3-form parity matrix on NebulaStream (33 YAMLs, 27/27 cells)
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feat(meos): TEMPORAL_LENGTH aggregation closes BerlinMOD-Q6 streaming-form cells to full
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feat(meos): PAIR_MEETING + CROSS_DISTANCE aggregations close Q5 + Q9 streaming-form cells to full
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docs(berlinmod): streaming-semantics tier overlay + remove stale 'Not covered' section
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feat(meos): parameterize PAIR_MEETING dMeet via SQL constant fifth arg
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feat(meos): parameterize CROSS_DISTANCE (vidA, vidB) via SQL constant args
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tools(codegen): MEOS-operator generator + design proposal for Nebula codegen path
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