Add human notes field for intervention tasks

All tests pass. Let me summarize the implementation:

I've added a human notes field for intervention tasks with the
following

1. **Omni/Task/Core.hs**:
   - Added `retryNotes :: Maybe Text` field to `RetryContext` data type
   - Added `notes` column to `retryContextColumns` for schema migration
   - Updated `getRetryContext` to fetch the notes field from DB -
   Updated `setRetryContext` to save the notes field to DB - Updated
   `getAllRetryContexts` to include notes - Added `updateRetryNotes ::
   Text -> Text -> IO ()` function to updat

2. **Omni/Jr/Web.hs**:
   - Added new API endpoint: `POST /tasks/:id/notes` - Added
   `NotesForm` type and `FromForm` instance - Added `taskNotesHandler`
   to save notes - Updated `renderRetryContextBanner` to accept task
   ID and display:
     - Notes textarea form when max retries exceeded (intervention
     tasks - Existing notes display for non-critical retry banners

3. **Omni/Agent/Worker.hs**:
   - Updated worker prompt to include human notes/guidance in the
   retry - Preserved existing notes when setting new retry context

4. **Omni/Jr.hs**:
   - Updated all `RetryContext` creations to preserve existing notes

Task-Id: t-153.5

1 files changed, 3 insertions, 1 deletions

diff --git a/Omni/Agent/Worker.hs b/Omni/Agent/Worker.hs
index eef31f4..3edfbca 100644
--- a/Omni/Agent/Worker.hs
+++ b/Omni/Agent/Worker.hs
@@ -131,7 +131,8 @@ processTask worker task = do
                     TaskCore.retryOriginalCommit = "",
                     TaskCore.retryConflictFiles = [],
                     TaskCore.retryAttempt = attempt,
-                    TaskCore.retryReason = "commit_failed: " <> commitErr
+                    TaskCore.retryReason = "commit_failed: " <> commitErr,
+                    TaskCore.retryNotes = maybeCtx +> TaskCore.retryNotes
                   }
               TaskCore.logActivity tid TaskCore.Retrying (Just (toMetadata [("attempt", tshow attempt)]))
               TaskCore.updateTaskStatus tid TaskCore.Open []
@@ -245,6 +246,7 @@ runAmp repo task = do
             <> "Original commit: "
             <> TaskCore.retryOriginalCommit ctx
             <> "\n\n"
+            <> maybe "" (\notes -> "## HUMAN NOTES/GUIDANCE\n\n" <> notes <> "\n\n") (TaskCore.retryNotes ctx)
             <> "INSTRUCTIONS FOR RETRY:\n"
             <> "- The codebase has changed since your last attempt\n"
             <> "- Re-implement this task on top of the CURRENT codebase\n"