* fix: dispatch execution_end hook on failed crew and flow executions
The `execution_end` interception point only fired after a successful
kickoff, so consumers never learned about failed runs. Crew kickoff
paths (`kickoff`/`akickoff`) and the flow runtime (`kickoff_async`,
`resume_async`) now dispatch it on the failure path too, with new
additive `status` ("completed"/"failed") and `error` fields on
`ExecutionEndContext`. Pairing flags guarantee exactly-once dispatch,
keep the start/end pairing invariant, and the original exception
propagates unchanged.
* fix: track execution_end pairing per invocation for reentrant flows
Reentrant kickoffs on the same Flow instance are supported (usage
aggregation already accommodates them), but the instance-level pairing
booleans let an inner kickoff's completion mark the outer execution as
ended, skipping the outer failure's `execution_end`. The pairing state
now lives in each `kickoff_async` invocation's locals, and the resume
path passes a per-invocation holder into `_resume_async_body`. Crew
keeps its instance flags since crew kickoffs are not reentrant on the
same instance (`kickoff_for_each` copies the crew).
* docs: group execution hooks and document all hook contexts
The hooks pages sat flat in the learn nav and only documented the LLM
and tool call contexts, with examples built on the legacy decorators.
Groups them under a collapsible "Execution Hooks" section, adds
`step-hooks` and `execution-boundary-hooks` pages covering every hook
context from source, reworks the LLM and tool pages to lead with `@on`
while keeping the decorators, and links the orphaned
`before-and-after-kickoff-hooks` page into the group.
* docs: prefix hook cross-links with /en so they resolve in edge
The new edge-only hooks pages linked each other with versionless paths
like `/learn/step-hooks`, which mintlify resolves against the frozen
default version where those pages do not exist, breaking the CI link
check. Uses the `/en/learn/...` form the other edge pages already use.
* docs: use /edge prefix for links to edge-only hooks pages
The `/en/learn/...` form still resolves against the default frozen
version, where `step-hooks` and `execution-boundary-hooks` do not exist
yet, so the link checker kept failing. Links now use the explicit
`/edge/en/learn/...` form, matching how `consuming-streams.mdx` linked
to edge-only streaming pages before they were frozen.
