Use consistent meeting artifact filenames

MeetingAssistant/Recording/ITranscriptStore.cs

@@ -9,10 +9,8 @@ public interface ITranscriptStore
 
     Task<TranscriptSession> CreateSessionAsync(
         MeetingAssistantOptions options,
-        CancellationToken cancellationToken)
-    {
-        return CreateSessionAsync(cancellationToken);
-    }
+        DateTimeOffset startedAt,
+        CancellationToken cancellationToken);
 
     Task AppendAsync(TranscriptSession session, TranscriptionSegment segment, CancellationToken cancellationToken)
     {

MeetingAssistant/Recording/MeetingRecordingCoordinator.cs

@@ -156,9 +156,9 @@ public sealed class MeetingRecordingCoordinator
 
             var launchProfile = ResolveProfile(launchProfileName);
             var runOptions = launchProfile.Options;
-            currentSession = await transcriptStore.CreateSessionAsync(runOptions, cancellationToken);
-            var recordedAudio = await recordedAudioStore.CreateSessionAsync(runOptions, cancellationToken);
             var startedAt = inactivityClock.Now;
+            currentSession = await transcriptStore.CreateSessionAsync(runOptions, startedAt, cancellationToken);
+            var recordedAudio = await recordedAudioStore.CreateSessionAsync(runOptions, cancellationToken);
             var assistantContextPath = GetAssistantContextPath(startedAt, runOptions);
             var summaryPath = GetSummaryPath(startedAt, runOptions);
             currentMeetingNote = await meetingNoteStore.SaveAsync(
@@ -1491,12 +1491,12 @@ public sealed class MeetingRecordingCoordinator
 
     private string GetAssistantContextPath(DateTimeOffset startedAt, MeetingAssistantOptions runOptions)
     {
-        return GetMeetingArtifactPath(runOptions.Vault, runOptions.Vault.AssistantContextFolder, startedAt, "assistant-context");
+        return GetMeetingArtifactPath(runOptions.Vault, runOptions.Vault.AssistantContextFolder, startedAt, MeetingArtifactFileNames.Context);
     }
 
     private string GetSummaryPath(DateTimeOffset startedAt, MeetingAssistantOptions runOptions)
     {
-        return GetMeetingArtifactPath(runOptions.Vault, runOptions.Vault.SummariesFolder, startedAt, "summary");
+        return GetMeetingArtifactPath(runOptions.Vault, runOptions.Vault.SummariesFolder, startedAt, MeetingArtifactFileNames.Summary);
     }
 
     private static string GetMeetingArtifactPath(
@@ -1506,7 +1506,7 @@ public sealed class MeetingRecordingCoordinator
         string artifactName)
     {
         var folder = VaultPath.Resolve(vault, configuredFolder);
-        return Path.Combine(folder, $"{startedAt:yyyyMMdd-HHmm}-{artifactName}.md");
+        return Path.Combine(folder, MeetingArtifactFileNames.Create(startedAt, artifactName));
     }
 
     private static bool ShouldAbortRunOnStop(RecordingRun run, DateTimeOffset stoppedAt)

MeetingAssistant/Recording/VaultTranscriptStore.cs

@@ -17,17 +17,18 @@ public sealed class VaultTranscriptStore : ITranscriptStore
 
     public async Task<TranscriptSession> CreateSessionAsync(CancellationToken cancellationToken)
     {
-        return await CreateSessionAsync(options, cancellationToken);
+        return await CreateSessionAsync(options, DateTimeOffset.Now, cancellationToken);
     }
 
     public async Task<TranscriptSession> CreateSessionAsync(
         MeetingAssistantOptions options,
+        DateTimeOffset startedAt,
         CancellationToken cancellationToken)
     {
         var folder = VaultPath.Resolve(options.Vault, options.Vault.TranscriptsFolder);
         Directory.CreateDirectory(folder);
 
-        var fileName = $"{DateTimeOffset.Now:yyyyMMdd-HHmmss-fffffff}-transcript.md";
+        var fileName = MeetingArtifactFileNames.Create(startedAt, MeetingArtifactFileNames.Transcript);
         var path = Path.Combine(folder, fileName);
         await File.WriteAllTextAsync(path, $"# Meeting Transcript{Environment.NewLine}{Environment.NewLine}", cancellationToken);
         logger.LogInformation("Created meeting transcript file {TranscriptPath}", path);