this and two related commits implements:
- setting snmp_field_protection which can be used to protect any
database field from having a null value set
- extra device discover worker which prefetches SNMP interfaces and
performs some sanity checks and comparison against the DB
the two checks will return job status ERROR with CANCELLED if they
see anything fishy.
A few things going on here ... swagger submitting "false" query
params which intefered with truth testing by existence, and also the
Node search not using {results => {}} format response for template,
and also that response then containing DBIC objects which cannot be
translated to JSON without running HRI first.
* This typically comes up when using a deployment.yml generated from
some inventory source, the device disappears and can then no
longer be deleted since netdisco-delete unnecessarily insists on
needing a valid device_auth
* initial v0 creator
* working json api for generic reports
* add require login
* move report swagger into plugin, and set new default layout of noop
* require proper role and also use new util func
* start to tidy authn
* some work on cleaning up web authn
* clean up the authN checks
* fix bug
* fix the auth for api
* fixes to json handling
* set swagger sort order
* enable most reports for api endpoints
* fix doc
* add paramters to reports
* add missed report
* allow api_parameters in reports config
* reorganise api
* add vlan search
* add port search
* make sure to enable layout processing
* add device search
* add v1 to api paths
* add Node Search
* support api_responses
* add device object search; fix spurious ports field in device result class
* handle some plugins just returning undef if search fails
* errors from api seamlessley
* fix error in date range default
* more sensible default for prefix
* change order of endpoints in swagger-ui
* all db row classes can now TO_JSON
* add device_port api endpoint
* add device ports endpoint
* do not expand docs
* add swagger ui json tree formatter
* add all relations from Device table
* add port relations
* add nodes retrieve on device or vlan
* rename to GetAPIKey
* update config for previous commit
