Add discount time checks for vending minters

[MightOfOaks]

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Cosm-Orc Gas Usage

Contract	Op Name	Gas Used	Old Gas Used	Gas Diff	File
open_edition_factory	Store__Store	3813089	3506900	+8.7310%	e2e/src/helpers/chain.rs:78
vending_factory	Store__Store	3408347	3082476	+10.5717%	e2e/src/helpers/chain.rs:78
base_factory	Store__Store	2989591	2696792	+10.8573%	e2e/src/helpers/chain.rs:78
base_minter	Store__Store	7166934	7068056	+1.3989%	e2e/src/helpers/chain.rs:78
open_edition_minter	Store__Store	8819481	8700070	+1.3725%	e2e/src/helpers/chain.rs:78
sg721_base	Store__Store	8525902	8416494	+1.2999%	e2e/src/helpers/chain.rs:78
sg721_metadata_onchain	Store__Store	8983749	8886444	+1.0950%	e2e/src/helpers/chain.rs:78
sg721_nt	Store__Store	7947246	7842375	+1.3372%	e2e/src/helpers/chain.rs:78
sg721_updatable	Store__Store	9332175	9204723	+1.3846%	e2e/src/helpers/chain.rs:78
sg_whitelist	Store__Store	3711208	3599317	+3.1087%	e2e/src/helpers/chain.rs:78
sg_whitelist_flex	Store__Store	3648262	3528506	+3.3940%	e2e/src/helpers/chain.rs:78
vending_minter	Store__Store	9050738	8892840	+1.7756%	e2e/src/helpers/chain.rs:78
vending_minter_merkle_wl	Store__Store	9280682	9138800	+1.5525%	e2e/src/helpers/chain.rs:78
vending_minter_wl_flex	Store__Store	9219725	9075906	+1.5846%	e2e/src/helpers/chain.rs:78
whitelist_immutable	Store__Store	2277614	2206354	+3.2298%	e2e/src/helpers/chain.rs:78
whitelist_mtree	Store__Store	7154909	7025364	+1.8440%	e2e/src/helpers/chain.rs:78

Raw Report for 184d034

Contract	Op Name	Gas Used	Gas Wanted	File
minter	Execute__minter_exec_mint_to_token	365541	525188	e2e/src/tests/open_edition_minter_executes_tests.rs:181
minter	Execute__minter_exec_purge	140236	187289	e2e/src/tests/open_edition_minter_executes_tests.rs:282
minter	Execute__minter_exec_update_per_addr_limit	209844	291648	e2e/src/tests/open_edition_minter_executes_tests.rs:217
minter	Execute__minter_exec_update_trading_time	271491	384116	e2e/src/tests/open_edition_minter_executes_tests.rs:100
multiple_contracts	Execute__minter_batch_exec_mint_token	3158258	4714526	e2e/src/tests/open_edition_factory_and_mint_tests.rs:276
multiple_contracts	Execute__minter_batch_exec_mint_token_w_trading_time	1942611	2902418	e2e/src/tests/factory_test.rs:314
open_edition_factory	Execute__factory_exec_minter_inst	547396	797967	e2e/src/tests/open_edition_factory_and_mint_tests.rs:206
open_edition_factory	Instantiate__factory_inst	188168	259134	e2e/src/helpers/open_edition_minter_helpers.rs:39
open_edition_factory	Execute__factory_exec_minter_inst_w_trading_time	548111	799041	e2e/src/tests/open_edition_factory_and_mint_tests.rs:411
open_edition_factory	Store__Store	3813089	5696493	e2e/src/helpers/chain.rs:78
vending_factory	Instantiate__factory_inst	187315	257855	e2e/src/helpers/helper.rs:35
vending_factory	Execute__factory_exec_minter_inst	34041977	51039753	e2e/src/tests/factory_test.rs:98
vending_factory	Store__Store	3408347	5089380	e2e/src/helpers/chain.rs:78
vending_factory	Execute__factory_exec_minter_inst_w_trading_time	3862735	5770907	e2e/src/tests/factory_test.rs:244
base_factory	Store__Store	2989591	4461246	e2e/src/helpers/chain.rs:78
base_minter	Store__Store	7166934	10727201	e2e/src/helpers/chain.rs:78
open_edition_minter	Store__Store	8819481	13206021	e2e/src/helpers/chain.rs:78
sg721_base	Store__Store	8525902	12765653	e2e/src/helpers/chain.rs:78
sg721_metadata_onchain	Store__Store	8983749	13452423	e2e/src/helpers/chain.rs:78
sg721_nt	Store__Store	7947246	11897669	e2e/src/helpers/chain.rs:78
sg721_updatable	Store__Store	9332175	13975062	e2e/src/helpers/chain.rs:78
sg_whitelist	Store__Store	3711208	5543672	e2e/src/helpers/chain.rs:78
sg_whitelist_flex	Store__Store	3648262	5449253	e2e/src/helpers/chain.rs:78
vending_minter	Store__Store	9050738	13552907	e2e/src/helpers/chain.rs:78
vending_minter_featured	Store__Store	9134302	13678253	e2e/src/helpers/chain.rs:78
vending_minter_merkle_wl	Store__Store	9280682	13897823	e2e/src/helpers/chain.rs:78
vending_minter_wl_flex	Store__Store	9219725	13806387	e2e/src/helpers/chain.rs:78
vending_minter_wl_flex_featured	Store__Store	9124812	13664018	e2e/src/helpers/chain.rs:78
whitelist_immutable	Store__Store	2277614	3393276	e2e/src/helpers/chain.rs:78
whitelist_mtree	Store__Store	7154909	10709163	e2e/src/helpers/chain.rs:78