scanner: fix library isolation, file mtime, force rescan, and deletion handling

Fix 1 - File modification time for created_at:
- Get file.ModTime() in processMediaFile and pass to CreateMediaItem
- Modified SQL INSERT to include created_at column

Fix 2 - Force rescan UPDATE instead of DELETE+INSERT:
- Changed force rescan logic to call updateMediaItem instead of delete + create
- Preserves created_at timestamp on force rescan

Fix 3 - GetMediaItemByFilePath filters by library_id:
- Added library_id to WHERE clause in SQL query
- Created GetMediaItemByFilePathAnyLibrary for cross-library lookups (KOReader)
- Added SetLibraryID method to MediaScanner
- Updated handler to call SetLibraryID for watch mode

Fix 4 - File deletion handling with persistent logging:
- Added fsnotify.Remove handler in WatchChanges
- Added orphan cleanup in ScanFolders after scan completes
- Created scanner_logger.go with daily log rotation (7 days)
- Logs to /app/logs/scanner-deletes-YYYY-MM-DD.log and scanner-errors-YYYY-MM-DD.log
- Individual deletes with enhanced safety logging

Note: Integration tests can now safely scan /app/uploads because
GetMediaItemByFilePath now filters by library_id, preventing
cross-library interference.

bruno/scanner/Scan Media Items.yml

@@ -21,6 +21,29 @@ http:
       }
   auth: inherit
 
+runtime:
+  scripts:
+    - type: after-response
+      code: |-
+        function onResponse(res) {
+          try {
+            const responseBody = res.getBody();
+            const job_id = responseBody.job_id;
+
+            if (job_id) {
+              bru.setEnvVar("job_id", job_id, { persist: true });
+              console.log("Access job_id saved:", job_id);
+            }
+            
+            if (!job_id) {
+              console.log("No job_ids found in response.");
+            }
+          } catch (error) {
+            console.error("Error in post-response script:", error.message);
+          }
+        }
+        onResponse(res);
+
 settings:
   encodeUrl: true
   timeout: 0