Manually uploaded text documents could get stuck showing "generating
summary" forever, and editing/re-saving a document mixed its trace into
the previous attempt.
Three related fixes:
1. finalizeIndexedKnowledgeState no longer marks a text document
completed the moment chunks are indexed. Doing so made
KnowledgePostProcess hit its non-processing guard and skip the
summary/question/graph fan-out, stranding summary_status on
"pending". The row now stays "processing" (still retrievable via
enable_status=enabled) and post-process remains the sole authority
that drives processing -> finalizing -> completed.
2. ProcessManualUpdate now allocates a fresh span-tracking attempt via
OpenAttempt. Previously it ran with attempt 0, so processChunks
dropped every stage span and KnowledgePostProcess fell back to
LatestAttempt, piling the new run's summary/wiki subspans onto the
prior attempt's trace.
3. Enrichment workers (summary, question, graph extract) skip when a
newer attempt has superseded theirs. A stale subtask from a previous
upload/edit/reparse must not read deleted chunks or decrement the new
attempt's pending_subtasks_count, which would race-promote the row to
completed before the new attempt finishes.
Updated TestFinalizeIndexedKnowledgeState to expect the deferred
completion for text documents.
wizardchen