resolve mechanical architecture review issues (C-01,C-02,C-03,W-01,W-09,W-10,W-12)

- C-01: fix broken README link (call-graph-runtime.md → call-graph.md)
- C-02: add CallEdgeAttrs union type alias in schema.md
- C-03/W-12: rename TypedEdgeAttrs → OperationEdgeAttrs for consistent
  {GraphType}EdgeAttrs naming pattern, update all references
- W-01: standardize terminology — prerequisites=structural/graph,
  preconditions=reactive/computed, rename WorkflowNode.prerequisites
  to preconditions, rename computePrerequisites to computePreconditions
- W-09: update ADR-001/002/003 status from Proposed to Accepted
- W-10: clarify call graph mutation API — addCall creates triggered
  edges automatically, addDependency creates depends_on edges
- update review checklist with resolved items

docs/architecture/workflow-templates.md

@@ -165,7 +165,7 @@ The HostConfig maps ujsx component types to graphology operations:
 ### Edge creation rules
 
 - **Sequential**: For children C1, C2, ..., Cn, edges C1→C2, C2→C3, ..., C(n-1)→Cn are added. Within a sequential group, children have implicit `depends_on` edges.
-- **Parallel**: No edges between children. All children have the same prerequisites as the parallel group itself.
+- **Parallel**: No edges between children. All children have the same preconditions as the parallel group itself.
 - **Conditional**: Edge from the conditional node's prerequisite to the first child of the branch, with `edgeType: "conditional"` and `condition` attribute.
 - **Nested**: A `Sequential` inside a `Parallel` has its own internal edges. A `Parallel` inside a `Sequential` creates a subgraph where all parallel children share the same predecessor.
 
@@ -265,7 +265,7 @@ Validation returns an array of `ValidationError` objects (never throws). See [an
 - **`Operation` props are workflow metadata** — `name`, `input`, `retries`, `timeout` are NOT passed to the HostConfig's `createInstance`. They're workflow-level configuration that the reactive execution engine uses to configure the call.
 - **Function props are not serializable** — `Conditional.test` with a function cannot be round-tripped through JSON. Use string references for stored templates.
 - **Sequential ordering is structural, not temporal** — a `Sequential` group means "these operations should complete in order", not "start the next only after the previous completes" (though the reactive engine implements this via preconditions).
-- **Parallel has no structural edges** — a `Parallel` group produces no DAG edges between its children. The execution engine starts them concurrently when the group's prerequisites are met.
+- **Parallel has no structural edges** — a `Parallel` group produces no DAG edges between its children. The execution engine starts them concurrently when the group's preconditions are met.
 - **Conditional branches are either/or** — a `Conditional` node renders to one branch or the `else` branch. There's no "both" evaluation.
 
 ## Open Questions