fix!: Correct absolute timelock boundary checks

Fix off-by-one error in absolute timelock checks. Bitcoin Core's
`IsFinalTx` uses strict less-than: tx is final when `nLockTime < MTP`
(for time) or `nLockTime < blockHeight` (for height). The previous
checks used `>` but should use `>=` to match Core's behavior.

Also add 4 new time-based timelock tests that verify BDK's predictions
match Bitcoin Core's actual broadcast acceptance at exact boundaries:
- test_absolute_time_timelock_logic (integration)
- test_relative_time_timelock_logic (integration)
- test_is_time_timelocked_absolute_unit
- test_is_time_timelocked_relative_unit

Patch miniscript to fix Plan::satisfy() not appending witnessScript
for P2WSH descriptors (rust-bitcoin/rust-miniscript#XXX).

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: evanlinjin

Cargo.toml

@@ -47,6 +47,7 @@ bdk_testenv = { git = "https://github.com/evanlinjin/bdk", branch = "feature/bit
 bdk_chain = { git = "https://github.com/evanlinjin/bdk", branch = "feature/bitcoind_rpc_emit_header" }
 bdk_core = { git = "https://github.com/evanlinjin/bdk", branch = "feature/bitcoind_rpc_emit_header" }
 bdk_bitcoind_rpc = { git = "https://github.com/evanlinjin/bdk", branch = "feature/bitcoind_rpc_emit_header" }
+miniscript = { git = "https://github.com/evanlinjin/rust-miniscript", branch = "fix/plan-satisfy-does-not-append-witness-script-for-p2wsh" }
 
 # bdk_chain = { git = "https://github.com/bitcoindevkit/bdk", branch = "master" }
 # bdk_core = { git = "https://github.com/bitcoindevkit/bdk", branch = "master" }