resolve architecture review round 2: criticals, warnings, suggestions

- C-05: Add flowgraph-api.md with complete public API surface
- C-06: Document <Map> component in workflow-templates.md
- C-07: Specify Conditional else-branch behavior
- C-08: Add lifecycle/ownership section to reactive-execution.md
- C-09: Add consumer-integration.md end-to-end walkthrough
- W-02: Add reactive error boundary semantics (3 levels)
- W-03: Complete ReactiveContext interface definition
- W-04: Add template composition rules (8 rules)
- W-05: Document removeChild for both HostConfigs
- W-06: Document signal/effect disposal lifecycle
- W-07: Add ADR-004 (no schema version field)
- W-08: Add type compatibility depth/contract to analysis.md
- W-11: Add performance characteristics section
- S-01: Getting Started merged into consumer-integration.md
- S-02: Add flow diagrams for template rendering pipeline
- S-03: Add node status state machine diagram
- S-04: Add testing strategy section
- S-06: Validate source structure cross-references

Review round 2 fixes:
- Define TemplateNodeAttrs as alias for OperationNodeAttrs
- Document CallEventMapValue and CallResult types in schema.md
- Standardize CycleError naming (replace CircularDependencyError)
- Add function form to Map.over type definition
- Define Map aggregate completion/failure semantics
- Fix immutability claim for fromCallEvents
- Clarify edgeType storage alongside OperationEdgeAttrs
- Clarify WorkflowNode.status === statusMap (same Signal)
- Add component-to-tag mapping for WorkflowTag

docs/architecture/README.md

@@ -1,6 +1,6 @@
 ---
 status: draft
-last_updated: 2026-05-19
+last_updated: 2026-05-20
 ---
 
 # @alkdev/flowgraph Architecture
@@ -54,12 +54,14 @@ Flowgraph is in Phase 0/1 (exploration → architecture). No code exists yet. Th
 | [schema.md](schema.md) | TypeBox Module, TypeScript types, enums (CallStatus, EdgeType, NodeStatus), node/edge attribute schemas, SerializedGraph factory |
 | [operation-graph.md](operation-graph.md) | Static graph from OperationSpecs, type-compatibility edges, construction paths, validation |
 | [call-graph.md](call-graph.md) | Dynamic graph from call events, node lifecycle, abort cascading, fromCallEvents construction |
-| [workflow-templates.md](workflow-templates.md) | ujsx components (`<Operation>`, `<Sequential>`, `<Parallel>`, `<Conditional>`), template→DAG hydration, serialization |
-| [host-configs.md](host-configs.md) | Graphology HostConfig (template→DAG analysis), Reactive HostConfig (template→execution engine), Instance types |
-| [reactive-execution.md](reactive-execution.md) | Signal-driven status propagation, computed preconditions, abort cascade via signals, ReactiveRoot integration |
-| [analysis.md](analysis.md) | Type-compatibility checking (input/output schema matching), precondition validation, execution ordering |
+| [workflow-templates.md](workflow-templates.md) | ujsx components (`<Operation>`, `<Sequential>`, `<Parallel>`, `<Conditional>`, `<Map>`), composition rules, template→DAG hydration, serialization |
+| [host-configs.md](host-configs.md) | Graphology HostConfig (template→DAG analysis), Reactive HostConfig (template→execution engine), Instance types, removeChild |
+| [reactive-execution.md](reactive-execution.md) | Signal-driven status propagation, computed preconditions, abort cascade via signals, ReactiveRoot integration, lifecycle and ownership, error boundaries |
+| [analysis.md](analysis.md) | Type-compatibility checking (input/output schema matching), compatibility depth, precondition validation, execution ordering, performance characteristics |
 | [error-handling.md](error-handling.md) | FlowgraphError hierarchy, CycleError, TypeIncompatError, ValidationError, error collection strategy |
 | [build-distribution.md](build-distribution.md) | Package structure, exports map, dependencies, platform targets |
+| [flowgraph-api.md](flowgraph-api.md) | FlowGraph class public API: constructor, type parameters, methods, delegation model, immutability guarantees |
+| [consumer-integration.md](consumer-integration.md) | End-to-end walkthrough from operation specs to running workflow, common patterns, module dependency map |
 
 ### Design Decisions
 
@@ -68,6 +70,7 @@ Flowgraph is in Phase 0/1 (exploration → architecture). No code exists yet. Th
 | [001](decisions/001-ujsx-as-template-ir.md) | ujsx tree as workflow template intermediate representation |
 | [002](decisions/002-dag-only-graph.md) | Enforce DAG invariants — no cycles in flowgraph |
 | [003](decisions/003-storage-decoupled.md) | Storage is not flowgraph's concern — in-memory graph with export/import boundary |
+| [004](decisions/004-no-schema-version.md) | No schema version field in serialized format — consumers wrap in their own versioned envelope |
 
 ## Consumer Context
 
@@ -100,6 +103,7 @@ src/
     sequential.ts       # <Sequential>...</Sequential>
     parallel.ts         # <Parallel>...</Parallel>
     conditional.ts      # <Conditional test={fn}>...</Conditional>
+    map.ts              # <Map over={array} as="item">...</Map>
     index.ts
   host/
     graphology.ts       # HostConfig: ujsx tree → graphology DAG