Parallelize PG checkpointer subtests

Each subtest now inserts its own PENDING run and runs under
t.Parallel(); shared state across subtests was the only reason they
had to stay sequential. Also adds a round-trip test that exercises
the approval-state fields (PendingToolCalls, PendingApprovals,
ApprovalInput, AllToolCalls, InnerCheckpoints, CompletedCalls) to
catch regressions where Save/Load drops nested or approval payloads.
The nonexistent-run case now uses a valid GID in the same tenant so
it reaches the row-not-found branch instead of short-circuiting on
the tenant-scope guard.

Signed-off-by: Aurélien Sibiril <81782+aureliensibiril@users.noreply.github.com>

pkg/coredata/pg_checkpointer_test.go

@@ -23,6 +23,7 @@ import (
 	"go.probo.inc/probo/pkg/agent"
 	"go.probo.inc/probo/pkg/agentruntest"
 	"go.probo.inc/probo/pkg/coredata"
+	"go.probo.inc/probo/pkg/gid"
 	"go.probo.inc/probo/pkg/llm"
 )
 
@@ -31,20 +32,20 @@ func TestPGCheckpointer(t *testing.T) {
 
 	client := agentruntest.PGClient(t)
 	store := coredata.NewPGCheckpointer(client)
-	ctx := context.Background()
-
-	run := agentruntest.InsertPendingRun(
-		t,
-		client,
-		"test-agent",
-		[]llm.Message{{Role: llm.RoleUser, Parts: []llm.Part{llm.TextPart{Text: "hello"}}}},
-	)
-	runID := run.ID.String()
 
 	t.Run(
 		"load returns nil when no checkpoint exists",
 		func(t *testing.T) {
-			cp, err := store.Load(ctx, runID)
+			t.Parallel()
+			ctx := context.Background()
+			run := agentruntest.InsertPendingRun(
+				t,
+				client,
+				"test-agent",
+				[]llm.Message{{Role: llm.RoleUser, Parts: []llm.Part{llm.TextPart{Text: "hello"}}}},
+			)
+
+			cp, err := store.Load(ctx, run.ID.String())
 			require.NoError(t, err)
 			assert.Nil(t, cp)
 		},
@@ -53,6 +54,16 @@ func TestPGCheckpointer(t *testing.T) {
 	t.Run(
 		"save and load round-trip",
 		func(t *testing.T) {
+			t.Parallel()
+			ctx := context.Background()
+			run := agentruntest.InsertPendingRun(
+				t,
+				client,
+				"test-agent",
+				[]llm.Message{{Role: llm.RoleUser, Parts: []llm.Part{llm.TextPart{Text: "hello"}}}},
+			)
+			runID := run.ID.String()
+
 			original := &agent.Checkpoint{
 				Status:    agent.AgentStatusSuspended,
 				AgentName: "test-agent",
@@ -84,6 +95,23 @@ func TestPGCheckpointer(t *testing.T) {
 	t.Run(
 		"save overwrites previous checkpoint",
 		func(t *testing.T) {
+			t.Parallel()
+			ctx := context.Background()
+			run := agentruntest.InsertPendingRun(
+				t,
+				client,
+				"test-agent",
+				[]llm.Message{{Role: llm.RoleUser, Parts: []llm.Part{llm.TextPart{Text: "hello"}}}},
+			)
+			runID := run.ID.String()
+
+			first := &agent.Checkpoint{
+				Status:    agent.AgentStatusSuspended,
+				AgentName: "test-agent",
+				Turns:     1,
+			}
+			require.NoError(t, store.Save(ctx, runID, first))
+
 			updated := &agent.Checkpoint{
 				Status:    agent.AgentStatusSuspended,
 				AgentName: "test-agent",
@@ -96,8 +124,7 @@ func TestPGCheckpointer(t *testing.T) {
 				Turns: 2,
 			}
 
-			err := store.Save(ctx, runID, updated)
+			require.NoError(t, store.Save(ctx, runID, updated))
-			require.NoError(t, err)
 
 			loaded, err := store.Load(ctx, runID)
 			require.NoError(t, err)
@@ -107,14 +134,85 @@ func TestPGCheckpointer(t *testing.T) {
 		},
 	)
 
+	t.Run(
+		"save and load preserves approval state",
+		func(t *testing.T) {
+			t.Parallel()
+			ctx := context.Background()
+			run := agentruntest.InsertPendingRun(
+				t,
+				client,
+				"test-agent",
+				[]llm.Message{{Role: llm.RoleUser, Parts: []llm.Part{llm.TextPart{Text: "hello"}}}},
+			)
+			runID := run.ID.String()
+
+			original := &agent.Checkpoint{
+				Status:    agent.AgentStatusAwaitingApproval,
+				AgentName: "test-agent",
+				Turns:     3,
+				PendingToolCalls: []llm.ToolCall{
+					{ID: "call-1", Function: llm.FunctionCall{Name: "send_email", Arguments: `{"to":"a@b.c"}`}},
+				},
+				PendingApprovals: []llm.ToolCall{
+					{ID: "call-1", Function: llm.FunctionCall{Name: "send_email", Arguments: `{"to":"a@b.c"}`}},
+				},
+				ApprovalInput: map[string]agent.ApprovalResult{
+					"call-2": {Approved: true},
+				},
+				AllToolCalls: []llm.ToolCall{
+					{ID: "call-1", Function: llm.FunctionCall{Name: "send_email"}},
+					{ID: "call-2", Function: llm.FunctionCall{Name: "log_event"}},
+				},
+				InnerCheckpoints: map[string]*agent.Checkpoint{
+					"call-3": {
+						Status:    agent.AgentStatusSuspended,
+						AgentName: "inner-agent",
+						Turns:     1,
+					},
+				},
+				CompletedCalls: []agent.CompletedCall{
+					{ToolCallID: "call-2", Result: agent.ToolResult{Content: "ok"}},
+				},
+			}
+
+			require.NoError(t, store.Save(ctx, runID, original))
+
+			loaded, err := store.Load(ctx, runID)
+			require.NoError(t, err)
+			require.NotNil(t, loaded)
+			assert.Len(t, loaded.PendingToolCalls, 1)
+			assert.Len(t, loaded.PendingApprovals, 1)
+			assert.True(t, loaded.ApprovalInput["call-2"].Approved)
+			assert.Len(t, loaded.AllToolCalls, 2)
+			require.Contains(t, loaded.InnerCheckpoints, "call-3")
+			assert.Equal(t, "inner-agent", loaded.InnerCheckpoints["call-3"].AgentName)
+			require.Len(t, loaded.CompletedCalls, 1)
+			assert.Equal(t, "ok", loaded.CompletedCalls[0].Result.Content)
+		},
+	)
+
 	t.Run(
 		"save to nonexistent run returns error",
 		func(t *testing.T) {
+			t.Parallel()
+			ctx := context.Background()
+			run := agentruntest.InsertPendingRun(
+				t,
+				client,
+				"test-agent",
+				[]llm.Message{{Role: llm.RoleUser, Parts: []llm.Part{llm.TextPart{Text: "hello"}}}},
+			)
+			// Build a syntactically valid GID for the same tenant but a
+			// different (unknown) entity so the tenant-scope check does
+			// not short-circuit with a parse error.
+			otherID := gid.New(run.ID.TenantID(), coredata.AgentRunEntityType)
+
 			cp := &agent.Checkpoint{
 				Status:    agent.AgentStatusSuspended,
 				AgentName: "test-agent",
 			}
-			err := store.Save(ctx, "nonexistent-run-id", cp)
+			err := store.Save(ctx, otherID.String(), cp)
 			require.Error(t, err)
 			assert.Contains(t, err.Error(), "not found")
 		},