Filter incident by tags using simple input field

[johannaengland]

Closes #1044.

This is the simplest implementation without any error handling, since I am working on implementing active search for tags.
The tags need to be entered in the format a=b, c=d.

[github-actions]

Test results

   10 files  1 060 suites   38m 16s ⏱️
  536 tests   535 ✅  1 💤 0 ❌
5 360 runs  5 350 ✅ 10 💤 0 ❌

Results for commit dc7b986.

♻️ This comment has been updated with latest results.

[hmpf]

All tags should be shown to all users. Tags cannot have owners, the fact that that's how we store them is an implementation ERROR. A "wat", to be exact. We have issues about changing how we store tags in the database already: #136, #817.

[podliashanyk]

See styling RFC below. Works otherwise

[hmpf]

When I try to run this, I very quickly run out of memory so badly that I either need to kill the test webserver or boot my machine. I suspect it is due to me testing with a copy of production data; our production currently has more than 14000 different, unique tags.

I do not recommend attempting to cram 14000+ tags into a single html file as drop-down options. I suspect type-ahead is an absolute necessity for tags if we are to only accept valid tags.

Also in production we are only using 30 different Tag keys. We could preload just the keys and have ppl select twice: first the key, then the value.

Get the number of values relative to keys by running Tag.objects.values("key").annotate(count=Count("value") in the shell or

SELECT "argus_incident_tag"."key", COUNT("argus_incident_tag"."value") AS "count" 
FROM "argus_incident_tag" GROUP BY "argus_incident_tag"."key"

in the dbshell.

[hmpf]

Cannot work as is with production data, too many tags.

[hmpf]

On my machine the limit seems to be somewhere between 5000 and 7500 tags. 5000 tags eventually loads, 7500 always croaks.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 25.00000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 79.62%. Comparing base (bfa8920) to head (dc7b986).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/argus/htmx/incident/filter.py	25.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1114      +/-   ##
==========================================
- Coverage   79.67%   79.62%   -0.05%     
==========================================
  Files         141      141              
  Lines        5288     5292       +4     
==========================================
+ Hits         4213     4214       +1     
- Misses       1075     1078       +3     

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