chore(logs): add detailed debugging logs

[hulxv]

Adds comprehensive debug logging to track critical state changes, message flows, and decision points in both Maker, Taker implementations (legacy + taproot protocols), and CLI binaries. Logs are conditionally compiled with #[cfg(debug_assertions)] and use structured formats with category prefixes.

Logging Categories

Maker

Category	Description
STATE_CHANGE	ConnectionState mutations (IP, fields, timers)
WALLET_STATE	Swapcoin additions/removals, UTXO pool changes, fidelity bonds
MSG_FLOW	Message handler entry/exit with validation results
CRYPTO_OP	Key generation, nonces, signatures (first 8 bytes only)
RECOVERY	Contract broadcasts, idle timeouts, recovery triggers
THREAD_POOL	Thread spawning, joining, active count

Taker

Category	Description
SWAP_STATE	Swap lifecycle, preimage, position changes, maker lists
MAKER_SELECTION	Candidate evaluation, selection logic, bad makers
TX_FLOW	Transaction creation, broadcasting, confirmations
MSG_EXCHANGE	Protocol messages with makers (direction, type, attempts)
HOP_PROGRESS	Multi-hop progression with locktime and position
CONTRACT_OP	Signature verification, contract validation, key operations
RECOVERY	Error detection, recovery triggers, timelock/hashlock spending
OFFERBOOK	Tracker sync, offer downloads, verification results
FEE_CALC	Coinswap and mining fees per hop
SWEEP_COORD	Taproot backwards sweep coordination (makers chain)

Close #549

[codecov]

Codecov Report

❌ Patch coverage is 26.92308% with 190 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.69%. Comparing base (776b75d) to head (80c5868).
⚠️ Report is 65 commits behind head on master.

Files with missing lines	Patch %	Lines
src/maker/handlers.rs	28.26%	33 Missing ⚠️
src/maker/server2.rs	30.23%	30 Missing ⚠️
src/taker/routines.rs	34.88%	28 Missing ⚠️
src/bin/taker.rs	29.41%	24 Missing ⚠️
src/maker/api.rs	22.58%	24 Missing ⚠️
src/bin/maker-cli.rs	0.00%	21 Missing ⚠️
src/maker/api2.rs	35.29%	11 Missing ⚠️
src/maker/rpc/server.rs	0.00%	7 Missing ⚠️
src/maker/handlers2.rs	25.00%	6 Missing ⚠️
src/taker/offers.rs	33.33%	4 Missing ⚠️
... and 1 more

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #625      +/-   ##
==========================================
+ Coverage   68.87%   76.69%   +7.81%     
==========================================
  Files          35       49      +14     
  Lines        4932    14570    +9638     
==========================================
+ Hits         3397    11174    +7777     
- Misses       1535     3396    +1861     

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