decompose architecture into 38 atomic tasks across 12 parallel generations

Decompose the reviewed architecture specs into taskgraph-managed tasks:
- 2 setup tasks (project init, test infrastructure)
- 4 schema tasks (enums, node attrs, edge attrs, graph schemas)
- 1 error hierarchy task
- 6 graph tasks (FlowGraph class, 3 construction paths, queries, validation)
- 5 analysis tasks (type-compat, build-type-edges, ordering, template-validation, defaults)
- 5 component tasks (Operation, Sequential, Parallel, Conditional, Map)
- 2 host config tasks (GraphologyHostConfig, ReactiveHostConfig)
- 4 reactive tasks (WorkflowRoot, node-status, max-concurrency, retry-semantics)
- 3 review tasks (foundation, reactive-and-hosts, complete-library)
- 5 meta cluster tasks (schema, graph, component, reactive, analysis layers)
- 1 API exports task

Validated with taskgraph: zero cycles, 38 tasks, 12 parallel generations.
Critical path: 12 tasks through reactive execution layer.

tasks/analysis-defaults.md

@@ -0,0 +1,39 @@
+---
+id: analysis/defaults
+name: Implement default value resolution for CallStatus, EdgeType, and node attributes
+status: pending
+depends_on:
+  - schema/enums
+  - schema/node-attrs
+  - schema/edge-attrs
+scope: single
+risk: trivial
+impact: isolated
+level: implementation
+---
+
+## Description
+
+Implement the defaults module that provides default values and resolution functions for categorical enums and node attributes. Used by construction and mutation methods to fill in unspecified fields.
+
+## Acceptance Criteria
+
+- [ ] `src/analysis/defaults.ts` exports default status, edge type, and attribute resolution functions
+- [ ] `defaultCallStatus: CallStatus` = `"pending"`
+- [ ] `defaultNodeStatus: NodeStatus` = `"idle"`
+- [ ] `defaultEdgeType(edgeType?: string): EdgeType` — returns the provided type or `"typed"` (operation graph default)
+- [ ] `resolveDefaultNodeAttrs(attrs: Partial<...>, defaults): NodeAttrs` — fills in missing required fields
+- [ ] Unit tests: each default value is correct, resolution with partial input
+
+## References
+
+- docs/architecture/analysis.md — defaults section
+- docs/architecture/schema.md — default values for NodeStatus, CallStatus
+
+## Notes
+
+> To be filled by implementation agent
+
+## Summary
+
+> To be filled on completion