* test(ema): cover period accessor + warmup/name metadata
Codecov flagged 9 lines in crates/wickra-core/src/indicators/ema.rs
(file at 94.03%): const accessor period (74-77), Indicator-impl
warmup_period (123-125), name (131-133). ema.rs now at 151/151.
* test(historical_volatility): cover periods/value accessors + name metadata
Codecov flagged 9 lines in crates/wickra-core/src/indicators/historical_volatility.rs
(file at 93.87%): const accessors periods (80-83), value (85-88) and
Indicator-impl name (153-155). historical_volatility.rs now at 147/147.
* test(kama): cover periods accessor + warmup/name metadata
Codecov flagged 9 lines in crates/wickra-core/src/indicators/kama.rs
(file at 91.26%): accessor periods (65-67), Indicator-impl
warmup_period (115-117), name (123-125). kama.rs now at 103/103.
* test(linreg_angle): cover period accessor + warmup/name metadata
Codecov flagged 9 lines in crates/wickra-core/src/indicators/linreg_angle.rs
(file at 88.15%): const accessor period (50-52), Indicator-impl
warmup_period (67-69), name (75-77). linreg_angle.rs now at 76/76.
* test(mass_index): cover periods/value accessors + name metadata
Codecov flagged 9 lines in crates/wickra-core/src/indicators/mass_index.rs
(file at 91.42%): const accessors periods (80-82), value (85-87) and
Indicator-impl name (134-136). mass_index.rs now at 105/105.
kingchenc
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