Add campaign configuration support

internal/config/load_validate_test.go

@@ -904,6 +904,7 @@ func TestValidateMissingAudioSource(t *testing.T) {
 				Report:                   boolPtr(true),
 			},
 		},
+		Campaign: &CampaignConfig{Campaign: "sample-campaign"},
 		Session: &SessionConfig{
 			SessionID: "2026-05-03",
 			Campaign:  "sample-campaign",
@@ -963,6 +964,7 @@ func TestExamplesLoadAndValidate(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			pipelinePath := filepath.Join(examplesDir, tt.pipelineFile)
+			campaignPath := filepath.Join(examplesDir, "campaign.yml")
 			sessionPath := filepath.Join(examplesDir, tt.sessionFile)
 
 			var (
@@ -972,7 +974,7 @@ func TestExamplesLoadAndValidate(t *testing.T) {
 			if strings.TrimSpace(tt.sessionOpts.SessionID) == "" {
 				cfg, err = Load(pipelinePath, sessionPath)
 			} else {
-				cfg, err = LoadWithSessionOptions(pipelinePath, sessionPath, tt.sessionOpts)
+				cfg, err = LoadWithSessionOptions(pipelinePath, campaignPath, sessionPath, tt.sessionOpts)
 			}
 			if err != nil {
 				t.Fatalf("load example config error = %v", err)
@@ -1001,14 +1003,34 @@ func writeConfigFiles(t *testing.T, pipelineYAML, sessionYAML string) (string, s
 
 	dir := t.TempDir()
 	pipelinePath := filepath.Join(dir, "pipeline.yml")
+	campaignPath := filepath.Join(dir, "campaign.yml")
 	sessionPath := filepath.Join(dir, "session.yml")
 
 	if err := os.WriteFile(pipelinePath, []byte(pipelineYAML), 0o644); err != nil {
 		t.Fatalf("write pipeline.yml: %v", err)
 	}
+	campaignYAML := `campaign: ` + campaignNameFromSessionYAML(sessionYAML) + `
+inputs:
+  speakers_file: ./speakers.yml
+  autocorrect_file: ./autocorrect.yml
+  glossary_file: ./glossary.yml
+`
+	if err := os.WriteFile(campaignPath, []byte(campaignYAML), 0o644); err != nil {
+		t.Fatalf("write campaign.yml: %v", err)
+	}
 	if err := os.WriteFile(sessionPath, []byte(sessionYAML), 0o644); err != nil {
 		t.Fatalf("write session.yml: %v", err)
 	}
 
 	return pipelinePath, sessionPath
 }
+
+func campaignNameFromSessionYAML(sessionYAML string) string {
+	for _, line := range strings.Split(sessionYAML, "\n") {
+		trimmed := strings.TrimSpace(line)
+		if strings.HasPrefix(trimmed, "campaign:") {
+			return strings.Trim(strings.TrimSpace(strings.TrimPrefix(trimmed, "campaign:")), `"'`)
+		}
+	}
+	return "sample-campaign"
+}