fix(api): return label color data as rgba strings

[prymitive]

No description provided.

[prymitive]

Go benchmark diff

name                               old time/op        new time/op        delta
pkg:github.com/prymitive/karma/cmd/karma goos:linux goarch:amd64
Compress/Run-2                           5.08ms ± 1%        5.09ms ± 1%     ~     (p=0.436 n=10+10)
Decompress/Run-2                         3.45ms ± 1%        3.57ms ± 2%   +3.37%  (p=0.000 n=10+9)
CompressionAndDecompression/Run-2        8.79ms ± 3%        9.21ms ± 2%   +4.81%  (p=0.000 n=9+10)
PullAlerts/0.17.0-2                      5.66ms ± 1%        5.77ms ± 2%   +1.84%  (p=0.002 n=10+10)
AlertsAPIMisses/0.17.0-2                 1.25ms ± 1%        1.29ms ± 2%   +2.44%  (p=0.000 n=10+10)
AlertsAPIHits/0.17.0-2                    860µs ± 1%         861µs ± 1%     ~     (p=0.529 n=10+10)
pkg:github.com/prymitive/karma/internal/alertmanager goos:linux goarch:amd64
DedupAlerts/Run-2                         159µs ± 2%         162µs ± 1%   +1.72%  (p=0.000 n=10+10)
DedupAutocomplete/Run-2                  94.1µs ± 1%        95.2µs ± 1%   +1.08%  (p=0.000 n=10+9)
DedupColors/Run-2                        21.7µs ± 1%        24.5µs ± 1%  +13.14%  (p=0.000 n=10+10)

name                               old %/compression  new %/compression  delta
pkg:github.com/prymitive/karma/cmd/karma goos:linux goarch:amd64
Compress/Run-2                             0.04 ± 0%          0.04 ± 0%     ~     (all equal)

name                               old B/alloc        new B/alloc        delta
pkg:github.com/prymitive/karma/cmd/karma goos:linux goarch:amd64
Compress/Run-2                            4.91M ± 0%         4.91M ± 0%   -0.03%  (p=0.000 n=9+9)
Decompress/Run-2                          3.02M ± 0%         3.02M ± 0%     ~     (p=0.984 n=9+10)
CompressionAndDecompression/Run-2         4.92M ± 0%         4.92M ± 0%   -0.05%  (p=0.000 n=9+10)
PullAlerts/0.17.0-2                       2.98M ± 0%         2.98M ± 0%   -0.09%  (p=0.000 n=9+9)
AlertsAPIMisses/0.17.0-2                  3.38M ± 0%         3.37M ± 0%   -0.15%  (p=0.000 n=9+9)
AlertsAPIHits/0.17.0-2                    3.34M ± 0%         3.33M ± 0%   -0.15%  (p=0.000 n=8+8)

name                               old alloc/op       new alloc/op       delta
pkg:github.com/prymitive/karma/cmd/karma goos:linux goarch:amd64
Compress/Run-2                           1.13MB ± 0%        1.13MB ± 0%     ~     (all equal)
Decompress/Run-2                         4.24MB ± 0%        4.24MB ± 0%     ~     (p=0.797 n=10+10)
CompressionAndDecompression/Run-2        5.38MB ± 0%        5.38MB ± 0%     ~     (all equal)
PullAlerts/0.17.0-2                      1.26MB ± 0%        1.26MB ± 0%   +0.06%  (p=0.000 n=9+10)
AlertsAPIMisses/0.17.0-2                 1.29MB ± 0%        1.29MB ± 0%   +0.16%  (p=0.006 n=9+10)
AlertsAPIHits/0.17.0-2                    312kB ± 1%         312kB ± 1%     ~     (p=0.105 n=10+10)
pkg:github.com/prymitive/karma/internal/alertmanager goos:linux goarch:amd64
DedupAlerts/Run-2                         108kB ± 0%         108kB ± 0%   -0.00%  (p=0.001 n=9+9)
DedupAutocomplete/Run-2                  44.8kB ± 0%        44.8kB ± 0%     ~     (p=0.222 n=10+10)
DedupColors/Run-2                        7.53kB ± 0%       11.01kB ± 0%  +46.14%  (p=0.000 n=10+9)

name                               old allocs/op      new allocs/op      delta
pkg:github.com/prymitive/karma/cmd/karma goos:linux goarch:amd64
Compress/Run-2                             31.0 ± 0%          31.0 ± 0%     ~     (all equal)
Decompress/Run-2                           80.0 ± 0%          80.0 ± 0%     ~     (all equal)
CompressionAndDecompression/Run-2           111 ± 0%           111 ± 0%     ~     (all equal)
PullAlerts/0.17.0-2                       22.5k ± 0%         22.5k ± 0%   +0.04%  (p=0.000 n=10+8)
AlertsAPIMisses/0.17.0-2                  5.98k ± 0%         5.98k ± 0%     ~     (p=0.137 n=8+10)
AlertsAPIHits/0.17.0-2                    2.35k ± 0%         2.33k ± 0%   -1.02%  (p=0.000 n=10+10)
pkg:github.com/prymitive/karma/internal/alertmanager goos:linux goarch:amd64
DedupAlerts/Run-2                           445 ± 0%           445 ± 0%     ~     (all equal)
DedupAutocomplete/Run-2                     142 ± 0%           142 ± 0%     ~     (all equal)
DedupColors/Run-2                          51.0 ± 0%          51.0 ± 0%     ~     (all equal)