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-update-readme.md

@@ -0,0 +1,54 @@
+---
+id: architecture/spec-update-readme
+name: Update architecture README.md — add new docs and ADRs to tables
+status: pending
+depends_on:
+  - architecture/spec-configuration
+  - architecture/spec-identity
+  - architecture/spec-secret-service
+  - architecture/spec-storage
+  - architecture/spec-flowgraph
+  - architecture/spec-interface
+  - architecture/spec-services
+  - architecture/review-adr-foundation
+scope: narrow
+risk: trivial
+impact: project
+level: implementation
+---
+
+## Description
+
+Update `docs/architecture/README.md` to add all new architecture documents and ADRs (026-034) to their respective tables. This is the final documentation assembly task — it runs after all new spec docs are created.
+
+**Changes to Architecture Documents table**:
+Add rows for: identity.md, services.md, interface.md, configuration.md, secret-service.md, storage.md, flowgraph.md
+
+**Changes to Research Documents table**:
+No changes needed — research docs stay as-is.
+
+**Changes to ADR Table**:
+Add ADRs 026-034 with correct titles and status (Accepted).
+
+**Changes to Current State section**:
+Update to reflect the new scope: services, identity, interface layer, configuration architecture.
+
+## Acceptance Criteria
+
+- [ ] Architecture Documents table includes all new docs (identity.md, services.md, interface.md, configuration.md, secret-service.md, storage.md, flowgraph.md) with correct status and descriptions
+- [ ] ADR table includes ADRs 026-034 with correct titles and "Accepted" status
+- [ ] Current State section updated to reflect expanded scope
+- [ ] `last_updated` in YAML frontmatter updated
+- [ ] No broken links (all new doc references point to files that exist)
+
+## References
+
+- docs/architecture/README.md — current content to update
+
+## Notes
+
+> To be filled by implementation agent
+
+## Summary
+
+> To be filled on completion