docs: add swagger and exchange flow dynamic diagram

[ngoctrng]

Code Metrics Report

	master (86125f0)	#12 (72d6ea1)	+/-
Coverage	66.6%	66.3%	-0.3%
Code to Test Ratio	1:0.5	1:0.4	-0.1
Test Execution Time	16s	1m0s	+44s

Details

  |                     | master (86125f0) | #12 (72d6ea1) |  +/-  |
  |---------------------|------------------|---------------|-------|
- | Coverage            |            66.6% |         66.3% | -0.3% |
  |   Files             |               29 |            30 |    +1 |
  |   Lines             |              450 |           452 |    +2 |
  |   Covered           |              300 |           300 |     0 |
- | Code to Test Ratio  |            1:0.5 |         1:0.4 |  -0.1 |
  |   Code              |             2870 |          3480 |  +610 |
  |   Test              |             1517 |          1517 |     0 |
- | Test Execution Time |              16s |          1m0s |  +44s |

Code coverage of files in pull request scope (47.5% → 47.0%)

Files	Coverage	+/-	Status
api/docs.go	0.0%	0.0%	added
internal/account/delivery/handlers.go	83.3%	0.0%	modified
internal/book/delivery/handlers.go	77.7%	0.0%	modified
internal/exchange/delivery/handlers.go	68.4%	0.0%	modified
internal/httpserver/server.go	0.0%	0.0%	modified

---

Reported by octocov

[github-actions]

Code Metrics Report

	master (86125f0)	#12 (72d6ea1)	+/-
Coverage	66.6%	66.3%	-0.3%
Code to Test Ratio	1:0.5	1:0.4	-0.1
Test Execution Time	16s	1m0s	+44s

Details

  |                     | master (86125f0) | #12 (72d6ea1) |  +/-  |
  |---------------------|------------------|---------------|-------|
- | Coverage            |            66.6% |         66.3% | -0.3% |
  |   Files             |               29 |            30 |    +1 |
  |   Lines             |              450 |           452 |    +2 |
  |   Covered           |              300 |           300 |     0 |
- | Code to Test Ratio  |            1:0.5 |         1:0.4 |  -0.1 |
  |   Code              |             2870 |          3480 |  +610 |
  |   Test              |             1517 |          1517 |     0 |
- | Test Execution Time |              16s |          1m0s |  +44s |

Code coverage of files in pull request scope (47.5% → 47.0%)

Files	Coverage	+/-	Status
api/docs.go	0.0%	0.0%	added
internal/account/delivery/handlers.go	83.3%	0.0%	modified
internal/book/delivery/handlers.go	77.7%	0.0%	modified
internal/exchange/delivery/handlers.go	68.4%	0.0%	modified
internal/httpserver/server.go	0.0%	0.0%	modified

---

Reported by octocov