Improve rdump exception logging

[JSCU-CNI]

This PR aims to improve rdump's exception logging when using the Elastic adapter.

1. We introduce an optional structlog dependency for colorized log output
2. We now flatten Elastic API errors so they are visible to the end-user
3. We now properly handle writer.excepthook so no exception occurs while handling exceptions
4. Rdump now prints exceptions in a less verbose way unless extra verbosity is enabled.
5. Return codes (0/1) of rdump should be handled better now.

Examples of new compact stacktraces:

$ target-query -q -f mft example.img | rdump -w "elastic+http://elastic:***@localhost:9200?verify_certs=0&index=test"
[reading from stdin]
2025-03-05T10:12:24.275042Z [error    ] rdump encountered a fatal error: Connection error caused by: ConnectionError(Connection error caused by: NewConnectionError(<urllib3.connection.HTTPConnection object at 0x7356a43ff4d0>: Failed to establish a new connection: [Errno 111] Connection refused))
$ 

$ rdump example.rec -w "elastic+http://elastic:***@localhost:9200?verify_certs=0&index=example"
[reading from stdin]
2025-03-05T10:16:45.148152Z [error    ] rdump encountered a fatal error: 500 document(s) failed to index. (400 strict_dynamic_mapping_exception [1:14] mapping set to strict, dynamic introduction of [hostname] within [_doc] is not allowed)
$

[codecov]

Codecov Report

Attention: Patch coverage is 48.10127% with 41 lines in your changes missing coverage. Please review.

Project coverage is 82.24%. Comparing base (8fe4343) to head (f32f0eb).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
flow/record/adapter/elastic.py	35.48%	20 Missing ⚠️
flow/record/tools/rdump.py	62.50%	12 Missing ⚠️
flow/record/stream.py	25.00%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #167      +/-   ##
==========================================
- Coverage   82.95%   82.24%   -0.72%     
==========================================
  Files          34       34              
  Lines        3591     3650      +59     
==========================================
+ Hits         2979     3002      +23     
- Misses        612      648      +36     

Flag	Coverage Δ
unittests	82.24% <48.10%> (-0.72%)	⬇️

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[yunzheng]

LGTM, @Schamper do you also want to do a quick review?