Follows Detector!418 and related

See merge request !4517

packer/unpacker cleanup / consolidation

See merge request !4463

Protect FT decoding from misordered links

See merge request !4513

define unpackers_map in the one module which uses it

- Remove the need for upfront_decoder.bind( source = ... ): compute the relevant argument from the requested location in _get_unpacked and pass it explicitly
- Remove ability to pack using deprecated, old-style 32-bit references which are known to overflow and lead to data corruption - only keep the ability to pack 64-bit references. Throw an exception if such an packing version still requested (note: the unpacking is left as-is)
- Improve implementation of packing and unpacking of references
- Unify setters in event model classes for SmartRef and pointer: remove redundant overloads (which could be ambiguous, and require additional casts!)

remove unused headers from Particle.h

See merge request !4502

Prepare LHCb v55r6

See merge request !4511

[ci skip]

MatVec invChol check for failure

Closes Moore#740

See merge request !4468

Support for using TAE events

See merge request !4455

decayLength rename in ParticleParams

See merge request !4485

Prepare LHCb v55r5

See merge request !4505

[ci skip]

This adds the necessary support to easily read "Super TAE" events.

PackedCaloHypo simple warning message modification

See merge request !4470

Prepare LHCb v55r4

See merge request !4500

[ci skip]

For DPA: Make the data_type optional as "data_type:Upgrade" is meaningless

See merge request !4496

Fixed packing of particle covariance matrix

Closes #347

See merge request !4467

MatCalibration: add fallback solution for missing conditions

See merge request !4475

InteractionRegion check if parent is nullptr before deref

See merge request !4495