feat(python): flows_to and the L3/L4 slice/flow verbs on the Python facade (#270, rc.1 leg) - #297

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rahlk wants to merge 15 commits into

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feat/issue-270-python-wiring

Commits on Jul 27, 2026

feat(graph): language-neutral local cpg provider mixin (#270)
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feat(python): pass -a 1-4 through and record the envelope's max_level (#270)
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fix(python): accept underscore analysis-level names in level plumbing (#270)
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feat(python): local backend joins the program-graph seam; duck-type hardening + pyfix goldens (#270)
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feat(python): five slice/flow facade verbs + cldk.graph public exports (#270)
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fix(test): correct mock ddg edge direction in facade delegate test (#270)
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feat(python): Neo4j program-graph provider + backend ABC joins the seam (#270)
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fix(python): source_slice degrades on synthetic parameter vertices instead of crashing (#270)
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test(python): live dual-backend parity + capability-degrade goldens (#270)
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fix(python): Neo4j provider speaks the emitter's real can:// vertex ids (closes #295) (#270)
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fix(graph): index nested callables and inner-class methods in the local provider (#270)
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fix(python): backend-identical resolve_location suffix match + source_slice contract (#270)
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test(python): parity suite covers prov, source_slice, resolve_location, flows_to, slice_forward (#270)
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chore(python): tidy guards, vacuous asserts, scoping symmetry, stale comments (#270)
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chore(design): log the staged L3/L4 wiring + provider contracts (#270)
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