docs: align historical plans/specs with renamed identifiers (roundTrip -> execute, log schema)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/superpowers/plans/2026-07-27-workout-not-found-plan.md

@@ -165,14 +165,14 @@ EOF
 ### Task 2: `internal/garmin/client.go` exposes `ErrNotFound`
 
 **Files:**
-- Modify: `backend/internal/garmin/client.go` (`wireResponse`, new `ErrNotFound`, `roundTrip`)
+- Modify: `backend/internal/garmin/client.go` (`wireResponse`, new `ErrNotFound`, `execute`)
 - Modify: `backend/internal/garmin/client_test.go` (`wireResponsePayload`/harness, new test)
 
 **Interfaces:**
 - Consumes: `wireResponse.NotFound` (wire field written by Task 1's `wrapper.py` change).
 - Produces: `var ErrNotFound error` -- Task 4 (`fillPendingWorkouts`) checks
   `errors.Is(err, garmin.ErrNotFound)` against errors returned by `GetWorkoutByID` (and, since
-  this is wired at the generic `roundTrip` level, any other `Client` method too).
+  this is wired at the generic `execute` level, any other `Client` method too).
 
 - [ ] **Step 1: Write the failing test**
 
@@ -256,7 +256,7 @@ already added it to the test file; the actual compile failure is `wireResponse`
 `NotFound` yet, and `ErrNotFound` is undefined) -- confirms the test exercises code that doesn't
 exist yet.
 
-- [ ] **Step 3: Add `ErrNotFound` and wire it through `roundTrip`**
+- [ ] **Step 3: Add `ErrNotFound` and wire it through `execute`**
 
 In `backend/internal/garmin/client.go`, replace:
 
@@ -289,7 +289,7 @@ type wireResponse struct {
 var ErrNotFound = errors.New("garmin: resource not found")
 ```
 
-Replace, in `roundTrip`:
+Replace, in `execute`:
 
 ```go
 	if resp.Error != "" {