feat(proto): Add location names filter to ListLocations

[devsjc]

Contribution Checklist

• Have you followed the Open Climate Fix Contribution Guidelines?
• Have you referenced the Issue this PR addresses, where applicable?
• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added a summary of the changes?
• Have you written new tests for your changes, where applicable?
• Have you successfully run make lint with your changes locally?
• Have you successfully run make test with your changes locally?

Warning

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Changes in this Pull Request

Adds a filter to the ListLocations route that allows for using the location names directly. Note that this may start to cause problems when the Sites database is merged in, as we may end up with duplicate names. One to think about.

[github-actions]

Benchmark Results

Benchmark results

?   	github.com/openclimatefix/data-platform/cmd	[no test files]
?   	github.com/openclimatefix/data-platform/internal/gen/ocf/dp	[no test files]
?   	github.com/openclimatefix/data-platform/internal/interceptors	[no test files]
PASS
ok  	github.com/openclimatefix/data-platform/internal/server/dummy	0.004s
{"level":"debug","time":"2026-04-23T16:01:54Z","message":"Completed migrations"}
goos: linux
goarch: amd64
pkg: github.com/openclimatefix/data-platform/internal/server/postgres
cpu: AMD EPYC 9V74 80-Core Processor                
BenchmarkPostgresClient/small/GetForecastAsTimeseries-4         	      94	  11936462 ns/op
BenchmarkPostgresClient/small/GetForecastAtTimestamp-4          	     393	   2910772 ns/op
BenchmarkPostgresClient/small/GetObservationsAsTimeseries-4     	    1296	    870204 ns/op
BenchmarkPostgresClient/small/CreateForecast-4                  	     142	   8208455 ns/op
PASS
ok  	github.com/openclimatefix/data-platform/internal/server/postgres	77.109s
?   	github.com/openclimatefix/data-platform/internal/server/postgres/gen	[no test files]

Benchmark vs base branch

goos: linux
goarch: amd64
pkg: github.com/openclimatefix/data-platform/internal/server/postgres
cpu: AMD EPYC 7763 64-Core Processor                
                                                   │ bench-main.txt │
                                                   │     sec/op     │
PostgresClient/small/GetForecastAsTimeseries-4         15.93m ± ∞ ¹
PostgresClient/small/GetForecastAtTimestamp-4          4.140m ± ∞ ¹
PostgresClient/small/GetObservationsAsTimeseries-4     1.255m ± ∞ ¹
PostgresClient/small/CreateForecast-4                  12.80m ± ∞ ¹
geomean                                                5.704m
¹ need >= 6 samples for confidence interval at level 0.95

cpu: AMD EPYC 9V74 80-Core Processor                
                                                   │ bench-devsjc-new-routes.txt │
                                                   │           sec/op            │
PostgresClient/small/GetForecastAsTimeseries-4                      11.94m ± ∞ ¹
PostgresClient/small/GetForecastAtTimestamp-4                       2.911m ± ∞ ¹
PostgresClient/small/GetObservationsAsTimeseries-4                  870.2µ ± ∞ ¹
PostgresClient/small/CreateForecast-4                               8.208m ± ∞ ¹
geomean                                                             3.969m
¹ need >= 6 samples for confidence interval at level 0.95