fix(ingestion): align zep-ingest with server-assigned UUIDs - #600

Critical

• ingestion/src/zep_ingest/result.py, _param_identity_prefix hunk around new lines 183–196: identity recovery stops permanently at the first task without the requested identity field. A failed task, or a mixed task type (for example, a node task while collecting edges), never gains that field, so UUIDs from all later successful tasks remain inaccessible even after wait() completes. Preserve task-position gaps with None, or track identities by task ID and only defer entries for nonterminal tasks. Add tests covering a failed or different-type task followed by a successful task.

• Critical — ingestion/src/zep_ingest/result.py, _sync_identities_from_task_params() hunk: edge_uuids is rebuilt solely from task_ids, but ingest_fact_triples() adds no task ID or placeholder when a submission fails or returns no task handle. Thus, if triple 0 fails submission and triple 1 succeeds, the latter’s UUID appears at edge_uuids[0], violating the documented alignment with submitted triples and potentially associating an edge with the wrong input. Track one slot per submitted triple, including submission failures/untracked responses, and map task IDs to those slots rather than deriving the list directly from task_ids. Add a regression test covering an early submission failure followed by a successful triple.

• Critical — ingestion/src/zep_ingest/result.py, _param_identity_prefix hunk: edge_uuids is aligned only with task_ids, not with submitted triples. If an earlier add_fact_triple call fails during submission, no task ID or placeholder is recorded; a later successful triple’s UUID shifts into the failed triple’s position. This contradicts the documented input-parallel contract and can associate facts with the wrong source records. Preserve the original submission index—e.g. add None immediately for submission failures/untracked calls and update UUIDs by task-to-input mapping rather than rebuilding solely from task_ids.

• Warning — ingestion/pyproject.toml:3 and ingestion/tests/test_basic.py version-test removal: The package version becomes 0.2.0, but zep_ingest.__init__ still falls back to 0.1.0 when distribution metadata is unavailable. Removing the version test hides this inconsistency, so source-tree imports report the previous release. Update the fallback to 0.2.0 and retain a test covering it.