Self describing push

[Tomer27cz]

I have attempted to make #11 dump work with the parser. Definitely needs review.

[Copilot]

Pull request overview

This PR adds support for parsing Landis+Gyr E450 “self-describing push” (unencrypted HDLC, Cyprus capture) by teaching the AXDR parser to interpret the embedded capture-object definition array and zip it with subsequent values, and adds an integration test + fixtures for the Cyprus dump.

Changes:

• Add AxdrParser::parse_self_describing_push_() and try it before the existing pattern-based traversal.
• Add a new HDLC integration test case for “Landis+Gyr E450 Cyprus”.
• Add the Cyprus dump fixture (raw hex + decoded XML) and expected parsed outputs.

Reviewed changes

Copilot reviewed 5 out of 7 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tests/test_meter_dumps.cpp	Registers a new integration subcase for the Cyprus Landis+Gyr E450 dump.
tests/expected/hdlc_landis_gyr_e450_cyprus.h	Adds raw frame bytes and expected OBIS→value mappings for the Cyprus dump.
tests/dumps/hdlc_landis_gyr_e450_cyprus.log	Adds the captured raw HDLC frame bytes.
tests/dumps/hdlc_landis_gyr_e450_cyprus_decoded.xml	Adds a decoded representation of the notification payload for reference.
src/dlms_parser/axdr_parser.h	Declares the new self-describing push parse helper.
src/dlms_parser/axdr_parser.cpp	Implements self-describing push parsing and hooks it into parse().

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[PolarGoose]

What is this "Self-Describing Push"?

[Tomer27cz]

The smart meter sends a schema defining its data layout, followed by the actual values. They should be in the same order so we can match the values to the obis codes.

"Self-Describing Push" isn't defined, I just came up with a name.

I'm not sure ho its "supposed to work". I just made the dump work.