in_tail plugins will fail to start when exceeded the number of placeholders for deleting inodes on DB.
So, this PR introduces an offloading operation which creates temp table and runs deletions with it.

Closes #11272

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Testing
Before we can approve your change; please submit the following in a comment:

• Example configuration file for the change

service:
  http_server: on
  http_listen: localhost
  http_port: 2020
  health_check: on

pipeline:
  inputs:
    - name: tail
      path: /tmp/flb_manyfiles/*
      tag_regex: (/tmp/flb_manyfiles/*)(?<original_path>.*)
      tag: tail:<original_path>
      read_from_head: true
      skip_long_lines: true
      ignore_older: 1d
      db: offsets.db
      db.locking: true
      inotify_watcher: false
      mem_buf_limit: 256MB

  filters:
    - name: rewrite_tag
      match: tail:*
      rule: $target_path ^(.*)$ $1 false

  outputs:
    - name: file
      match: '*'
      path: output/path
      mkdir: true
      format: template
      template: '{log}'

• Debug log output from testing the change

This change can detect this type of overflow and use temp database to drop the definitions beyond the number of limit of SQLite's placeholders.

[2026/01/22 15:50:28.415157022] [debug] [input:tail:tail.0] 60000 new files found on path '/tmp/flb_manyfiles/*'
[2026/01/22 15:50:28.415179297] [ warn] [input:tail:tail.0] db: large file set detected (60000 files) exceeds SQLite variable limit (32766); using temp-table cleanup for stale inode deletion
[2026/01/22 15:50:28.507476246] [ info] [input:tail:tail.0] db: delete unmonitored stale inodes from the database: count=0

• Attached Valgrind output that shows no leaks or memory corruption was found

If this is a change to packaging of containers or native binaries then please confirm it works for all targets.

• Run local packaging test showing all targets (including any new ones) build.
• Set ok-package-test label to test for all targets (requires maintainer to do).

Documentation

• Documentation required for this feature

Backporting

• Backport to latest stable release.

Fluent Bit is licensed under Apache 2.0, by submitting this pull request I understand that this code will be released under the terms of that license.