Detained but granted LTE, show up on immigration record?

[ssude1]

I am a US citizen with no other ties to the UK besides having studied there on a Tier 4 student visa from late 2015 to January 2017.

When I tried re-entering the country in March 2017, I was detained at the UK border in Stansted airport for about 10 hours. I was interrogated/interviewed by an immigration officer who hand-wrote the entire thing as a way of recording it; to my knowledge there was no voice or video recording captured. I had my fingerprints and mugshot taken as well. I was eventually told that I had been granted Leave to Enter as I had originality requested (for up to but not exceeding 6 months).

I am currently working on an EEA family permit to submit by Feb 2018 for an April 2018 re-entry (7+months since I have been in the UK). I am wondering if a detainee report exists for me or will show up on my immigration records, possibly negatively affecting my chances of being granted the Family Permit. Or, since I was eventually granted LTE, if that day will just show up as an previous entry date.

Thank you for your help!

[secret.simon]

Make a Subject Access Request for your immigration history with the UKV&I. A fee of £10 is applicable.

What is the basis of your EEA family permit?

[ssude1]

@secret.simon I recently got married to my EEA partner who lives in the UK. We had been in a relationship for 6-7 months at the time of my detainment. As part of my interrogation, I was asked explicit questions about my relationships and sex life, but because I was afraid having a relationship within London (even a newish one) would negatively affect my being allowed LTE, I said I wasn't in any serious relationship, just casual... 10 months later this partner and I are married, so that's why I'm a bit worried about any detainment record that might throw shade on the validity of our relationship/marriage.