test(bash-lint): cover 'Stage manual execution context' generator (#1062)

Add a `parameters:` block to execution-context-agent.md so the
ManualContextContributor activates and its bash step
'Stage manual execution context (aw-context/manual/*)' is linted.
Register the display name in REQUIRED_STEP_DISPLAY_NAMES.

The manual contributor's bash body (set -euo pipefail + node call) is
structurally identical to every other exec-context contributor, but it
was not being exercised by any fixture and would silently drop out of
lint coverage if it changed.

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: github-actions[bot]

tests/bash_lint_tests.rs

@@ -121,6 +121,7 @@ const REQUIRED_STEP_DISPLAY_NAMES: &[&str] = &[
     "ado-aw",                  // src/compile/extensions/ado_aw_marker.rs metadata marker step
     "Stage PR execution context (aw-context/pr/*)", // src/compile/extensions/exec_context/pr.rs
     "Stage workitem execution context (aw-context/workitem/*)", // src/compile/extensions/exec_context/workitem.rs (activated by PR trigger)
+    "Stage manual execution context (aw-context/manual/*)", // src/compile/extensions/exec_context/manual.rs (activated by parameters: block)
     "Resolve synthetic PR context", // src/compile/extensions/ado_script.rs synthetic_pr_step()
 ];
 

tests/fixtures/execution-context-agent.md

@@ -1,23 +1,22 @@
 ---
 name: "Execution Context Agent"
-description: "Agent exercising the execution-context PR contributor"
+description: "Agent exercising the execution-context PR contributor and manual contributor"
 on:
   pr:
     branches:
       include: [main]
+parameters:
+- name: topic
+  type: string
+  default: ""
+  displayName: "Topic to work on"
 ---
 
 ## Execution Context Agent
 
-This fixture exercises the always-on `ExecContextExtension` with the PR
-contributor in its default configuration.
-
-When triggered by a pull request, the precompute step stages
-`aw-context/pr/base.sha` and `aw-context/pr/head.sha` under
-`$(Build.SourcesDirectory)/aw-context/`, and appends a tailored prompt
-fragment to the agent prompt with literal PR id / project / repo values
-plus example `git diff $BASE..$HEAD` and Azure DevOps MCP tool calls.
-
-On preparation failure the step writes `aw-context/pr/error.txt` and a
-failure-mode prompt fragment instead.
+This fixture exercises the always-on `ExecContextExtension` with:
+- The **PR contributor** (activated by `on.pr`) — stages `aw-context/pr/*`
+  artefacts and appends a PR-context prompt fragment.
+- The **manual contributor** (activated by the `parameters:` block) — stages
+  `aw-context/manual/*` artefacts when the pipeline is queued manually.