Alpha roadmap: pattern recognition and the next providers

Nodal Framework is still an alpha, which is exactly the right time to test its most ambitious architectural claim: a provider-neutral graph model can support portable intelligence without flattening the native strengths of each graph engine.
P2 remains the production-hardening track. P3 starts the optional
Nodal.PatternRecognition package. P4+ records the research horizon so
experimental ideas do not silently become compatibility promises.
Nodal.PatternRecognition is not another database provider. It is an optional
analytics shell above every provider: Neo4j, TigerGraph, and future engines
keep their own query languages, transports, and native accelerators, while the
shell consumes Nodal's canonical nodes, relationships, paths, events, and
capability declarations. Provider pushdown is an optimization; the analysis
contract and its evidence remain portable.