Refactor analysis file names

The versioning of analysis input and document files
(`analysis_input_v{N}.json`, `document_v{N}.md`) has been removed. All
analysis inputs will now use `analysis_input.json` and generated
documents will use `document.md`.

This simplifies file management, as there's no longer a need to track
and manage multiple versions of these files within a case directory. The
analysis worker will now overwrite the existing `document.md` if it
exists, ensuring that the latest analysis result is always present. The
`version` field has also been removed from `AnalyzeJob` and
`AnalysisInput`.

server/src/analyze/worker.rs

@@ -5,7 +5,7 @@ use std::time::Duration;
 use tokio::io::AsyncWriteExt;
 use tracing::{error, info, warn};
 
-use super::{llm, prompt, AnalysisInput, AnalyzeReceiver};
+use super::{llm, prompt, AnalysisInput, AnalyzeReceiver, ANALYSIS_INPUT_FILE, DOCUMENT_FILE};
 use crate::config::Config;
 use crate::{BusyGuard, WorkerBusy};
 
@@ -23,7 +23,7 @@ pub async fn run(
 
     while let Some(job) = rx.recv().await {
         let _guard = BusyGuard::new(worker_busy.clone());
-        process(&job.case_dir, job.version, &config, &client, timeout).await;
+        process(&job.case_dir, &config, &client, timeout).await;
     }
 
     warn!("Analyze worker stopped (channel closed)");
@@ -31,13 +31,12 @@ pub async fn run(
 
 async fn process(
     case_dir: &Path,
-    version: u32,
     config: &Config,
     client: &reqwest::Client,
     timeout: Duration,
 ) {
-    let input_path = case_dir.join(format!("analysis_input_v{version}.json"));
-    let document_path = case_dir.join(format!("document_v{version}.md"));
+    let input_path = case_dir.join(ANALYSIS_INPUT_FILE);
+    let document_path = case_dir.join(DOCUMENT_FILE);
 
     // If the document already exists, the job is obsolete (e.g. recovery
     // re-enqueued a finished case during a race). Skip silently.
@@ -69,7 +68,7 @@ async fn process(
         if let Err(e) = tokio::fs::remove_file(&input_path).await {
             warn!(path = %input_path.display(), error = %e, "removing analysis input failed");
         }
-        info!(case = %case_dir.display(), version, "analysis done (stub, no recordings)");
+        info!(case = %case_dir.display(), "analysis done (stub, no recordings)");
         return;
     }
 
@@ -77,7 +76,6 @@ async fn process(
     let total_chars = user_content.chars().count();
     info!(
         case = %case_dir.display(),
-        version,
         recording_count = input.recordings.len(),
         total_chars,
         "sending to llm"
@@ -106,7 +104,7 @@ async fn process(
         Err(e) => {
             // Do not log the response body — LlmError::Display is already
             // redacted, but reinforce the rule here for future readers.
-            error!(case = %case_dir.display(), version, error = %e, "llm call failed");
+            error!(case = %case_dir.display(), error = %e, "llm call failed");
             return;
         }
     };
@@ -125,7 +123,6 @@ async fn process(
 
     info!(
         case = %case_dir.display(),
-        version,
         bytes = document.len(),
         "analysis done"
     );