fix(records): raise TypeError instead of leaking AttributeError for typed arguments

[andersfylling]

Reported in review: passing a raw dict where a typed request object is expected fails deep inside the SDK, naming neither the argument nor the type.

client.data_modeling.records.filter(
    stream_id=STREAM_ID,
    last_updated_time={"gte": since_str},   # dict instead of TimeRange
    filter=HasData(containers=[(SPACE, CONTAINER)]),
)
# AttributeError: 'dict' object has no attribute 'dump'

client.data_modeling.records.filter(stream_id=STREAM_ID, sort=["lastUpdatedTime"])
# AttributeError: 'str' object has no attribute 'dump'

last_updated_time, sort, sources, target_units and filter now share one dump helper: the typed object is dumped, a dict is passed through as the wire form it already is, and anything else raises TypeError naming the argument, the expected type and a worked example. sources and target_units additionally accept a single object instead of requiring a one-item sequence — target_units=RecordTargetUnit(...) used to fail with 'RecordTargetUnit' object is not iterable.

Accepting dicts is what makes the reported snippet work rather than merely fail better, and it matches instances.list, which already takes InstanceSort | dict. The signatures are widened to match, so a dict is no longer a type-checker error at the call site either.

First commit is the failing tests, second is the fix, including the regenerated sync client.

🤖 Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 97.46835% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.79%. Comparing base (629c506) to head (58d988e).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
cognite/client/_api/data_modeling/records.py	94.28%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2749   +/-   ##
=======================================
  Coverage   93.79%   93.79%           
=======================================
  Files         513      513           
  Lines       52445    52515   +70     
=======================================
+ Hits        49189    49256   +67     
- Misses       3256     3259    +3     

Files with missing lines	Coverage Δ
cognite/client/_sync_api/data_modeling/records.py	100.00% <100.00%> (ø)
...s_unit/test_api/test_data_modeling/test_records.py	100.00% <100.00%> (ø)
cognite/client/_api/data_modeling/records.py	98.13% <94.28%> (+0.59%)	⬆️

... and 6 files with indirect coverage changes

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