haiku.rag.ingester.sources was never ingester-only: one-shot client
ingestion resolves adapters through it (create_document_from_source), and
convert() now fetches through HTTPSource, so the core client imported into
the ingester package to reach them.
Move the package to haiku.rag.sources and update every import. No shims:
haiku.rag.ingester.sources is gone.
The haiku.rag.sources plugin entry-point group is unchanged, so third-party
source packages need no edit — the group name now matches the module path it
always implied.
Source unit tests move to tests/sources/. test_source_plugins.py stays in
tests/ingester/: it drives a PeriodicPoller against the job repo, so it is
plugin wiring through ingester machinery rather than a source test.
Large files buffered entirely in RAM can OOM workers. Add
max_file_size to source config (default None = no limit).
FS checks stat().st_size before read_bytes(). HTTP and WebDAV issue
a HEAD request before GET when a limit is configured. S3 checks the
size from the existing head_async() call before get_async().
FileTooLargeError is classified as PermanentError so oversized files
go straight to the DLQ instead of retrying.
Both are OSError subclasses caught by the broad timeout/io handler
and classified as transient. Pointing at a directory instead of a
file or a broken path component will never succeed on retry.
PermissionError is a subclass of OSError, so it was caught by the
broad timeout/io handler and classified as transient. An unreadable
file would retry 5 times then DLQ — permissions don't fix themselves
without operator intervention.
Add an explicit PermissionError check before the OSError catch so
unreadable files go straight to the DLQ.
FileNotFoundError is a subclass of OSError, so it was caught by the
broad timeout/io handler and classified as transient. A file deleted
between discovery and fetch would retry 5 times on a file that's
permanently gone, then DLQ with a confusing error message.
Add an explicit FileNotFoundError check before the OSError catch so
deleted files go straight to the DLQ.
