Add campaign configuration support

internal/config/config.go

@@ -1,11 +1,16 @@
 package config
 
-// Config is the resolved combined configuration from pipeline.yml and session.yml.
+// Config is the resolved combined configuration from pipeline.yml,
+// campaign.yml, and session.yml.
 type Config struct {
 	Pipeline     *PipelineConfig
+	Campaign     *CampaignConfig
 	Session      *SessionConfig
 	PipelinePath string
+	CampaignPath string
 	SessionPath  string
+
+	StableInputs ResolvedStableInputs
 }
 
 // PipelineConfig contains durable pipeline-level settings.
@@ -25,6 +30,19 @@ type PipelineConfig struct {
 	Notification NotificationConfig `yaml:"notification"`
 }
 
+// CampaignConfig contains stable campaign-level identity and input defaults.
+type CampaignConfig struct {
+	Campaign string               `yaml:"campaign"`
+	Inputs   CampaignInputsConfig `yaml:"inputs"`
+}
+
+// CampaignInputsConfig contains stable campaign-level input file references.
+type CampaignInputsConfig struct {
+	SpeakersFile    string `yaml:"speakers_file"`
+	AutocorrectFile string `yaml:"autocorrect_file"`
+	GlossaryFile    string `yaml:"glossary_file"`
+}
+
 // SessionConfig contains per-session inputs and metadata.
 type SessionConfig struct {
 	SessionID         string              `yaml:"session_id"`
@@ -229,3 +247,18 @@ type SessionInputsConfig struct {
 type SessionAudioS3Input struct {
 	Prefix string `yaml:"prefix"`
 }
+
+// ResolvedStableInputs records where stable input file paths came from after
+// campaign/session merge.
+type ResolvedStableInputs struct {
+	SpeakersFile    ResolvedInputFile
+	AutocorrectFile ResolvedInputFile
+	GlossaryFile    ResolvedInputFile
+}
+
+// ResolvedInputFile records one merged config path and its source config file.
+type ResolvedInputFile struct {
+	Path       string
+	ConfigPath string
+	Source     string
+}