perf(discovery): baseline profile + hot-path fixes for the token leaderboard

[bmc08gt]

Mitigates a low-end-device ANR (Bugsnag 6a46563b) where the main thread stalled composing/measuring the Discover-tab token leaderboard, and wires proper baseline profile generation so that path (and token info + market-cap chart) is AOT-compiled.

Perf:

• Hoist the LazyColumn item key off the composition hot path: compute each token's base58 address once in the VM (new LeaderboardEntry) instead of in the itemsIndexed { key } lambda (base58 is BigInteger division).

Baseline profile (was a hand-written 43-line wildcard file with zero feature coverage; the generator existed but was never wired):

• Apply androidx.baselineprofile (producer + consumer) and consume the generated profile via baselineProfile(project(":apps:flipcash:benchmark")). Bump androidx-benchmark-macro 1.4.1 -> 1.5.0-alpha07 for AGP 9 support.
• Add a Discover journey to BaselineProfileGenerator (tap token -> token info -> scroll -> scrub market-cap chart -> toggle time windows -> back -> fling list) and a LeaderboardScrollBenchmark (FrameTiming, None vs BaselineProfile).
• Replace the hand-written profile with the generated one (59k lines) covering TokenLeaderboard/TokenMetricsRow/TokenInfoScreen/MarketCapSection/MarketCapChart.

Testability (no production exposure):

• Gate testTagsAsResourceId on BuildConfig.UI_TESTABLE (true for debug + profile-gen/benchmark variants, false for shipping release) instead of DEBUG, so UiAutomator/Maestro/baseline-profile generation can resolve testTags in the nonMinifiedRelease variant while the shipping wallet keeps internal ids private.
• Add testTags: discovery_leaderboard, leaderboard_token_row, token_info_screen, market_cap_chart, market_cap_period_*.
• Add for macrobenchmark.