feat(templates): add missing escalation targets + concept-intake stage

fix-test-fixture-sonnet@1, review-spec-opus@1, replan-spec-opus@1 — the
dangling escalation refs from airouter-impl-*/spec-draft/feature-delivery-loop.
Sonnet-authored, Opus-reviewed; review HIGH fixes applied (explicit model: opus
on both opus nodes — node model: sets runtime model, composite name does not).
Known gap filed in work-items epic (E1-escalation-state-gap.md): escalation
edges from non-primary states 422 state_mismatch pending escalation_input_states.
concept-intake@1: optional idea-elaboration pre-stage (output state
idea-elaborated — not yet wired into spec-draft-opus input).
All four validate against controlplane WorkflowTemplate schema.

task-templates/workflow/fix-test-fixture-sonnet@1.yaml

@@ -0,0 +1,47 @@
+name: fix-test-fixture-sonnet
+version: 1
+description: Repair broken test fixtures without weakening assertions, Sonnet in worktree (escalation from airouter-impl-narrow/-ready fixture_broken)
+runtime: code-sonnet-tdd-repo
+input:
+  state: test-validated
+  tags_forbidden: [security-sensitive]
+  required_artifacts: [test_file]
+output:
+  state: test-write-pending
+scope_budget:
+  files_modified_max: 2
+  lines_diff_max: 60
+  wall_clock_seconds_max: 900
+nodes:
+  - id: agent
+    kind: agent
+    template: code-sonnet-tdd-repo
+    prompt: |
+      A test-validation or implementation attempt against ${artifacts.test_file} was
+      escalated as fixture_broken — the failure is in fixtures, imports, or pytest
+      collection, NOT in missing implementation logic.
+
+      Repair the fixture/collection problem WITHOUT weakening any test assertion:
+      - Every test in ${artifacts.test_file} MUST remain marked
+        @pytest.mark.xfail(strict=True, reason="<spec-id>: <description>") against the
+        unimplemented code it exercises. Do not remove, loosen, or convert xfail markers
+        to skip/pass, and do not delete or rewrite assertions to make them pass.
+      - Fix only fixture/conftest/import problems: missing conftest fixtures, broken
+        imports, malformed fixture YAML, incorrect path references.
+      - Check any fixture YAML against these known-bad patterns (the violation codes
+        enforced by scripts/workflow/preflight-fixture-lint in the agent-runtimes repo):
+          MISSING_ALLOW_UNAUTHENTICATED — auth fixture missing allow_unauthenticated: true
+          MISSING_V1_PREFIX            — URL path does not start with /v1/
+          BODY_GET_TYPE                — body.get("type") instead of RFC 9457 type field
+          SPACE_ID_PLACEHOLDER         — space_id value is "s" or another placeholder
+          TOP_LEVEL_PARAMS             — top-level params: key instead of nested under workflow:
+          TOP_LEVEL_NODES              — top-level nodes: key instead of nested under workflow:
+      - Do NOT touch the implementation skeleton or any non-test, non-fixture file.
+
+      Verify the fix with:
+        python -m pytest --collect-only ${artifacts.test_file}
+      Collection MUST succeed and every test MUST still report xfail (not error, not pass).
+
+      Commit and push to the work branch.
+escalation:
+  agent_bailed: fix-test-fixture-sonnet