tasks: decompose Phase 0b spec documents and Phase 0c review

Add 15 new tasks under tasks/architecture/ for Phase 0b (spec writing)
and Phase 0c (review):

Phase 0b — New specs (6):
  - spec-configuration: promote from research, cleanup, align with ADRs
  - spec-identity: carry from auth.md + services.md, canonical Identity
  - spec-secret-service: from research/services.md SecretProtocol
  - spec-storage: from research/storage.md, contract-level
  - spec-flowgraph: from research/flow.md, pure computation crate
  - spec-interface: new Layer 2 spec (highest risk new spec)
  - spec-services: irpc service layer + OperationEnv (broadest scope)

Phase 0b — Spec updates (6):
  - spec-update-overview: add crate structure, Layer 3, services
  - spec-update-auth: IdentityProvider vs AuthService relationship
  - spec-update-call-protocol: OperationEnv dispatch paths
  - spec-update-server: DynamicConfig, ForwardingPolicy, IdentityProvider
  - spec-update-napi: reload API, call protocol references
  - spec-update-open-questions: resolve OQs per ADR decisions

Phase 0b — Assembly (1):
  - spec-update-readme: add new docs and ADRs to tables

Phase 0c — Review (1):
  - review-spec-foundation: validate consistency checklist

Generation structure (6 total):
  Gen 1: 6 independent ADRs (parallel)
  Gen 2: adr-027, adr-028 (depend on adr-029)
  Gen 3: adr-033 + 6 spec docs + open-questions update (parallel)
  Gen 4: adr review + interface/services specs + 4 spec updates
  Gen 5: call-protocol update + readme update
  Gen 6: spec review

tasks/architecture/spec-flowgraph.md

@@ -0,0 +1,52 @@
+---
+id: architecture/spec-flowgraph
+name: Create flowgraph.md architecture spec (or stub referencing crate docs)
+status: pending
+depends_on:
+  - architecture/adr-027-crate-decomposition
+scope: narrow
+risk: low
+impact: component
+level: implementation
+---
+
+## Description
+
+Create `docs/architecture/flowgraph.md` — an architecture spec for the `alknet-flowgraph` crate, covering FlowGraph<N,E>, operation graph construction, call graph population, and type compatibility checking.
+
+Like storage.md, this can be a contract-level document if the crate will have its own docs later. The key contract point: `OperationSpec` and `CallNodeAttrs` types must match alknet-core's definitions, with serialization as the bridge.
+
+**Source**: `docs/research/flow.md` (472 lines, straightforward port of TypeScript design)
+
+This is the lowest-risk new spec — pure computation crate, no I/O, no external state, straightforward petgraph port.
+
+## Acceptance Criteria
+
+- [ ] `docs/architecture/flowgraph.md` exists with YAML frontmatter (`status: draft`)
+- [ ] Follows spec format: What, Why, Architecture, Constraints, Open Questions, Design Decisions
+- [ ] Documents `FlowGraph<N, E>` generic graph over `petgraph::DiGraph`
+- [ ] Documents `NodeAttributes` / `EdgeAttributes` traits
+- [ ] Documents operation graph construction from `OperationSpec`s
+- [ ] Documents call graph population from `EventEnvelope` events
+- [ ] Documents type compatibility checking (jsonschema)
+- [ ] Documents cycle detection, topological sort, reachability queries
+- [ ] Documents serde serialization/deserialization
+- [ ] States crate dependencies: petgraph, serde, serde_json, jsonschema, thiserror
+- [ ] States crate does NOT depend on alknet-core, alknet-storage, or alknet-secret
+- [ ] States interface back to core: OperationSpec and CallNodeAttrs types match alknet-core's definitions; bridge is serialization
+- [ ] References ADR-027
+- [ ] `docs/architecture/README.md` updated to include flowgraph.md
+
+## References
+
+- docs/research/flow.md — full FlowGraph, operation graph, call graph design
+- docs/research/integration-plan.md — Phase 2.3 (alknet-flowgraph)
+- docs/architecture/decisions/027-crate-decomposition.md
+
+## Notes
+
+> To be filled by implementation agent
+
+## Summary
+
+> To be filled on completion