More validation

[rowanseymour]

• Max flow name: 64 chars (enforced in RP db)
• Max cases per switch router: 100
• Max arguments per case: 100
• Max attachments on message: 10
• Max quick replies on message: 10
• Max quick reply text length: 64
• Max groups on add_contact_groups action: 100
• Max labels on add_input_labels action: 100

The best day to add limits is always today

[codecov]

Codecov Report

Attention: Patch coverage is 58.82353% with 7 lines in your changes missing coverage. Please review.

Project coverage is 69.11%. Comparing base (9abc13d) to head (760aa3c).

Files with missing lines	Patch %	Lines
flows/routers/switch.go	62.50%	4 Missing and 2 partials ⚠️
flows/routers/base.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1341      +/-   ##
==========================================
- Coverage   69.12%   69.11%   -0.02%     
==========================================
  Files         277      277              
  Lines       21203    21212       +9     
==========================================
+ Hits        14657    14660       +3     
- Misses       6123     6127       +4     
- Partials      423      425       +2     

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