Validate incoming GPS data (#951)

* Validate incoming GPS data and throw an error if it is incorrect, storing Null values

* Extracted GPS data processing to function in external parser; optimized IF in internal parser; removed unnecessary comments; set exact values for positive test

* Add the migration for removing existing invalid GPS data and its test; added better errors to asserts in the GPS validation test

* Install FFmpeg and ExifTool on the API unit-test environment

* Fix 'stripped.jpg', 'IncorrectGPS.jpg', and 'CorrectGPS.jpg' tests for the external parser

* Optimized data validation in the external parser, returned error by the internal parser for invalid data, updated test to expect errors and handle them

* Switched from error to log entry in case of incorrect GPS data, as error handling is not so transparent in the internal parser

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Co-authored-by: Konstantin Koval

.github/workflows/tests.yml

@@ -72,12 +72,12 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-go-
 
-      - name: Get C dependencies
+      - name: Get C dependencies and 3rd-party tools
         run: |
           sudo add-apt-repository ppa:strukturag/libheif
           sudo add-apt-repository ppa:strukturag/libde265
           sudo apt-get update
-          sudo apt-get install -y libdlib-dev libblas-dev libatlas-base-dev liblapack-dev libjpeg-turbo8-dev libheif-dev
+          sudo apt-get install -y libdlib-dev libblas-dev libatlas-base-dev liblapack-dev libjpeg-turbo8-dev libheif-dev ffmpeg exiftool
 
       - name: Get GO dependencies
         run: |