More config, more tests

[jsneedles]

Some more config options (mainly for local/staging development)

• Allows overriding the hcti.io default host with an environment variable .... but again, nobody should do this 😄
• Adds a new DI extension for using an already injected service when configuring the HCTI options
• Cleans up the repetitive validation in the DI extensions
• Adds more tests for the changed host url stuff

[github-actions]

Test results

89 tests   89 ✅  0s ⏱️
 1 suites   0 💤
 1 files     0 ❌

Results for commit 099be88.

♻️ This comment has been updated with latest results.

[github-actions]

Benchmark Results

HtmlCssToImage.Benchmarks.Benchmarks.HmacBenchmark

BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.4 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.201
  [Host]  : .NET 10.0.5 (10.0.5, 10.0.526.15411), X64 RyuJIT x86-64-v3
  .NET 10 : .NET 10.0.5 (10.0.5, 10.0.526.15411), X64 RyuJIT x86-64-v3

Job=.NET 10  EnvironmentVariables=DOTNET_TieredPGO=0  Runtime=.NET 10.0  
Server=True  MaxIterationCount=20  MaxWarmupIterationCount=5  
MinWarmupIterationCount=2  

Method	Mean	Error	StdDev	Ratio	Gen0	Allocated	Alloc Ratio
Hmac_Standard_Instance	2.049 μs	0.0099 μs	0.0087 μs	1.00	0.0648	696 B	1.00
HCTI_HmacToken_Optimized	1.831 μs	0.0035 μs	0.0029 μs	0.89	0.0191	152 B	0.22

HtmlCssToImage.Benchmarks.Benchmarks.MakeAuthHeaderBenchmark

BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.4 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.201
  [Host]  : .NET 10.0.5 (10.0.5, 10.0.526.15411), X64 RyuJIT x86-64-v3
  .NET 10 : .NET 10.0.5 (10.0.5, 10.0.526.15411), X64 RyuJIT x86-64-v3

Job=.NET 10  EnvironmentVariables=DOTNET_TieredPGO=0  Runtime=.NET 10.0  
Server=True  MaxIterationCount=20  MaxWarmupIterationCount=5  
MinWarmupIterationCount=2  

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Allocated	Alloc Ratio
AuthHeader_Standard_StringFormat	90.23 ns	1.224 ns	1.085 ns	1.00	0.02	0.0366	376 B	1.00
HCTI_AuthHeader_Optimized	82.44 ns	0.823 ns	0.770 ns	0.91	0.01	0.0221	168 B	0.45

HtmlCssToImage.Benchmarks.Benchmarks.QueryStringEncoderBenchmark

BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.4 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.201
  [Host]  : .NET 10.0.5 (10.0.5, 10.0.526.15411), X64 RyuJIT x86-64-v3
  .NET 10 : .NET 10.0.5 (10.0.5, 10.0.526.15411), X64 RyuJIT x86-64-v3

Job=.NET 10  EnvironmentVariables=DOTNET_TieredPGO=0  Runtime=.NET 10.0  
Server=True  MaxIterationCount=20  MaxWarmupIterationCount=5  
MinWarmupIterationCount=2  

Method	Mean	Error	StdDev	Ratio	Gen0	Allocated	Alloc Ratio
BuiltIn_HttpUtility	1.165 μs	0.0104 μs	0.0097 μs	1.00	0.2937	2976 B	1.00
HCTI_QueryStringEncoder	1.107 μs	0.0095 μs	0.0089 μs	0.95	0.1450	744 B	0.25

HtmlCssToImage.Benchmarks.Benchmarks.TemplateListUrlBenchmark

BenchmarkDotNet v0.15.8, Linux Ubuntu 24.04.4 LTS (Noble Numbat)
AMD EPYC 7763 2.45GHz, 1 CPU, 4 logical and 2 physical cores
.NET SDK 10.0.201
  [Host]  : .NET 10.0.5 (10.0.5, 10.0.526.15411), X64 RyuJIT x86-64-v3
  .NET 10 : .NET 10.0.5 (10.0.5, 10.0.526.15411), X64 RyuJIT x86-64-v3

Job=.NET 10  EnvironmentVariables=DOTNET_TieredPGO=0  Runtime=.NET 10.0  
Server=True  MaxIterationCount=20  MaxWarmupIterationCount=5  
MinWarmupIterationCount=2  

Method	templateId	nextPageStart	Mean	Error	StdDev	Ratio	Gen0	Allocated	Alloc Ratio
Basic	?	?	69.14 ns	0.253 ns	0.211 ns	1.00	0.0168	128 B	1.00
Optimized	?	?	24.38 ns	0.065 ns	0.058 ns	0.35	0.0084	64 B	0.50
Basic	t-daa(...)2efe6 [38]	?	87.75 ns	0.363 ns	0.303 ns	1.00	0.0389	312 B	1.00
Optimized	t-daa(...)2efe6 [38]	?	28.80 ns	0.595 ns	0.528 ns	0.33	0.0140	144 B	0.46
Basic	t-daa(...)2efe6 [38]	1735689600	81.00 ns	0.308 ns	0.273 ns	1.00	0.0290	296 B	1.00
Optimized	t-daa(...)2efe6 [38]	1735689600	41.54 ns	0.304 ns	0.285 ns	0.51	0.0186	192 B	0.65