qwen3.6-plus did not have an explicit entry in DEFAULT_CONTEXT_LENGTHS,
so the longest-substring fallback matched the generic 'qwen': 131072
catch-all. That dropped the effective context limit from 1,048,576
tokens to 131,072, prematurely lowered the compression threshold, and
produced misleading warnings about main/compression context mismatch
in long sessions.
Add an explicit 'qwen3.6-plus': 1048576 entry before the catch-all and
cover it with a regression test (bare, qwen/, and dashscope/ prefixes).
Note: PR #6599 also mentions touching model_metadata.py but the actual
diff only edits hermes_cli/models.py, so this fix is independent and
not duplicated by that PR.
Closes#27008
The restart-drain test previously asserted equality between two calls
to t("gateway.draining", count=1), which masked the original
xdist failure mode in #22266: if the locale catalog is not resolved
from the worker's import path, t() returns the bare key path and
both sides of the equality still match.
Add a guard that the resolved value is not the raw catalog key and
contains the English placeholder substitution. This keeps the test
loudly failing when locale resolution silently degrades.
haran2001