Fix tl/tq/td flag injection for Temporal CLI

[bicabone]

Summary

• fix wrapped temporal invocation to inject context flags after the top-level command (temporal workflow --address ... list) to match Temporal CLI behavior
• keep root/option-only invocations (temporal, temporal --help) unwrapped
• ensure _temporalctx_build_flags always returns success when config parsing succeeds, even when optional fields are missing
• add regression test: missing context fields do not produce empty-value flags

Repro and validation

• previous failing path: tl produced unknown flag: --address
• verified tl now works against real CLI
• ran ./tests/run.sh and all tests pass