fix: architecture review - address 5 critical issues, 6 warnings, 3 suggestions

Critical fixes:
- C1: Create standalone ADR-006 file (edge type consistency),
  extract from open-questions.md inline content
- C2: Convert CallResult from plain interface to TypeBox schema,
  aligning with 'TypeBox as single source of truth' constraint
- C3: Add fromJSON() cycle detection specification - enforce
  ADR-002 DAG invariant even on deserialized input
- C4: Rewrite consumer-integration.md Phase 4 to use ADR-005
  event-append pattern instead of direct signal mutation
- C5: Fix operator precedence bug in consumer-integration.md
  (missing parentheses around OR condition)

Warnings addressed:
- W1: Fix immutability claim - operation graph is 'conventionally
  immutable', not prevented by API
- W2: Add EventLogProjection to reactive exports map
- W3: Add CallResult/CallResultSchema to schema exports map
- W4: Fix reactive-execution.md Level 1 error handling to use
  event-append pattern instead of direct signal mutation
- W5: Remove duplicate dataFlow inference description in schema.md
- W6: Clarify ADR-006 project context (flowgraph vs taskgraph)

Suggestions implemented:
- S1: Add 'reviewed' document lifecycle status between draft/stable,
  update all docs to reviewed status
- S2: Add carve-out note for analysis result types in schema.md
  constraints (they are ephemeral, not serialized)
- S3: Add isComplete() and getAggregateStatus() convenience methods
  to WorkflowReactiveRoot specification

docs/architecture/build-distribution.md

@@ -1,5 +1,5 @@
 ---
-status: draft
+status: reviewed
 last_updated: 2026-05-20
 ---
 
@@ -236,9 +236,9 @@ Following the taskgraph pattern, each module has a sub-path export:
 | `@alkdev/flowgraph` | Barrel export (everything) | Full import |
 | `@alkdev/flowgraph/component` | `<Operation>`, `<Sequential>`, `<Parallel>`, `<Conditional>`, `<Map>` | Template authoring |
 | `@alkdev/flowgraph/host` | `GraphologyHostConfig`, `ReactiveHostConfig` | ujsx HostConfig implementations |
-| `@alkdev/flowgraph/schema` | TypeBox schemas, enums, types | Schema-only import (no graph dependency) |
+| `@alkdev/flowgraph/schema` | TypeBox schemas, enums, types (including `CallResultSchema`, `CallResult`) | Schema-only import (no graph dependency) |
 | `@alkdev/flowgraph/graph` | `FlowGraph` class, construction, mutation, queries | Core graph operations |
-| `@alkdev/flowgraph/reactive` | `WorkflowReactiveRoot`, signal-based execution | Runtime execution |
+| `@alkdev/flowgraph/reactive` | `WorkflowReactiveRoot`, `EventLogProjection`, signal-based execution | Runtime execution |
 | `@alkdev/flowgraph/analysis` | `typeCompat`, `validateTemplate`, ordering functions | Analysis and validation |
 | `@alkdev/flowgraph/error` | Error classes | Error handling |