docs: add bulk_export_meetings contract (T8.5, FR-STORE-4)

docs/04-api-contracts.md

@@ -55,6 +55,9 @@ list_tags(): string[]                                          // all known tag
 // NoteTemplate = { id: string, name: string, sections: string[] } (T8.1, FR-NOTE-5). Meeting
 // gained `template_id: string | null` — the template picked at start_recording.
 list_note_templates(): NoteTemplate[]
+// Bulk export (T8.5, FR-STORE-4): every meeting matching tag/from/to, one file (or bundle
+// folder) per meeting under destDir. Returns the count actually exported.
+bulk_export_meetings(input: { destDir: string; format: "md" | "pdf" | "docx" | "bundle"; tag?: string; from?: number; to?: number }): number
 
 // ---- LLM / AI provider (ADR-0007/0011) ----
 // provider ∈ ollama | custom | anthropic | openai | off. Hosted-provider API keys are passed to